/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:46:30,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:46:30,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:46:30,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 15:46:30,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 15:46:30,567 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:46:30,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:46:30,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:46:30,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:46:30,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:46:30,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:46:30,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:46:30,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:46:30,569 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:46:30,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:46:30,569 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:46:30,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:46:30,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:46:30,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:46:30,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:46:30,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:46:30,572 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:46:30,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:46:30,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:46:30,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:46:30,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:46:30,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:46:30,776 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:46:30,782 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:46:30,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl [2022-03-15 15:46:30,783 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl' [2022-03-15 15:46:30,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:46:30,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:46:30,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:46:30,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:46:30,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:46:30,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,830 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:46:30,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:46:30,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:46:30,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:46:30,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:46:30,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:46:30,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:46:30,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:46:30,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:46:30,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/1) ... [2022-03-15 15:46:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:46:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:30,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 15:46:30,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 15:46:30,917 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:46:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:46:30,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:46:30,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 15:46:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 15:46:30,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 15:46:30,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:46:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:46:30,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:46:30,918 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:46:30,950 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:46:30,951 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:46:31,022 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:46:31,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:46:31,053 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 15:46:31,055 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:46:31 BoogieIcfgContainer [2022-03-15 15:46:31,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:46:31,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:46:31,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:46:31,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:46:31,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:46:30" (1/2) ... [2022-03-15 15:46:31,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e47f96a and model type chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:46:31, skipping insertion in model container [2022-03-15 15:46:31,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:46:31" (2/2) ... [2022-03-15 15:46:31,066 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.bpl [2022-03-15 15:46:31,070 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:46:31,070 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:46:31,070 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:46:31,070 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:46:31,095 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 15:46:31,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:46:31,127 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:46:31,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 15:46:31,133 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2022-03-15 15:46:31,144 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:46:31,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,164 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2064485406, now seen corresponding path program 1 times [2022-03-15 15:46:31,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539067188] [2022-03-15 15:46:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:31,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:31,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539067188] [2022-03-15 15:46:31,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539067188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:46:31,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:46:31,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:46:31,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856706757] [2022-03-15 15:46:31,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:46:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:46:31,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:31,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:46:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,302 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:31,347 INFO L93 Difference]: Finished difference Result 50 states and 90 transitions. [2022-03-15 15:46:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:46:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:46:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:31,354 INFO L225 Difference]: With dead ends: 50 [2022-03-15 15:46:31,355 INFO L226 Difference]: Without dead ends: 45 [2022-03-15 15:46:31,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,358 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:31,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-15 15:46:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2022-03-15 15:46:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2022-03-15 15:46:31,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2022-03-15 15:46:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:31,394 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2022-03-15 15:46:31,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2022-03-15 15:46:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:46:31,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:46:31,395 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1999164596, now seen corresponding path program 2 times [2022-03-15 15:46:31,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972745432] [2022-03-15 15:46:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:31,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:31,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972745432] [2022-03-15 15:46:31,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972745432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:46:31,456 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:46:31,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:46:31,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87514012] [2022-03-15 15:46:31,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:46:31,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:46:31,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:46:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,458 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:31,496 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2022-03-15 15:46:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:46:31,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:46:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:31,497 INFO L225 Difference]: With dead ends: 48 [2022-03-15 15:46:31,497 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 15:46:31,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,512 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:31,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 15:46:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-03-15 15:46:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-03-15 15:46:31,521 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-03-15 15:46:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:31,521 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-03-15 15:46:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-03-15 15:46:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:46:31,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 15:46:31,523 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash -147006164, now seen corresponding path program 3 times [2022-03-15 15:46:31,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296284527] [2022-03-15 15:46:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:31,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:31,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296284527] [2022-03-15 15:46:31,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296284527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:46:31,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:46:31,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:46:31,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321024704] [2022-03-15 15:46:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:46:31,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:46:31,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:31,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:46:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,588 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:31,645 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2022-03-15 15:46:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:46:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:46:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:31,646 INFO L225 Difference]: With dead ends: 36 [2022-03-15 15:46:31,646 INFO L226 Difference]: Without dead ends: 36 [2022-03-15 15:46:31,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:46:31,647 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:31,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-15 15:46:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-03-15 15:46:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-03-15 15:46:31,652 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-03-15 15:46:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:31,652 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-03-15 15:46:31,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-03-15 15:46:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:46:31,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 15:46:31,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1919200413, now seen corresponding path program 1 times [2022-03-15 15:46:31,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036069239] [2022-03-15 15:46:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:46:31,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:31,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036069239] [2022-03-15 15:46:31,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036069239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:46:31,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:46:31,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:46:31,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3447326] [2022-03-15 15:46:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:46:31,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:46:31,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:46:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,693 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:31,718 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2022-03-15 15:46:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:46:31,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:46:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:31,719 INFO L225 Difference]: With dead ends: 38 [2022-03-15 15:46:31,719 INFO L226 Difference]: Without dead ends: 38 [2022-03-15 15:46:31,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:46:31,721 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:31,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-15 15:46:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-15 15:46:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2022-03-15 15:46:31,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 13 [2022-03-15 15:46:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:31,726 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2022-03-15 15:46:31,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2022-03-15 15:46:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:46:31,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 15:46:31,727 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash 575521047, now seen corresponding path program 2 times [2022-03-15 15:46:31,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721166401] [2022-03-15 15:46:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:46:31,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:31,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721166401] [2022-03-15 15:46:31,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721166401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:46:31,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:46:31,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:46:31,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207714717] [2022-03-15 15:46:31,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:46:31,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:46:31,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:46:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,789 INFO L87 Difference]: Start difference. First operand 38 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:31,813 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2022-03-15 15:46:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:46:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:46:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:31,820 INFO L225 Difference]: With dead ends: 59 [2022-03-15 15:46:31,820 INFO L226 Difference]: Without dead ends: 59 [2022-03-15 15:46:31,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,821 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:31,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-15 15:46:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2022-03-15 15:46:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2022-03-15 15:46:31,826 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2022-03-15 15:46:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:31,826 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2022-03-15 15:46:31,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2022-03-15 15:46:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:46:31,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 15:46:31,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1678540769, now seen corresponding path program 3 times [2022-03-15 15:46:31,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217817518] [2022-03-15 15:46:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:46:31,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:31,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217817518] [2022-03-15 15:46:31,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217817518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:46:31,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:46:31,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:46:31,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5637751] [2022-03-15 15:46:31,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:46:31,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:46:31,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:31,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:46:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,893 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:31,923 INFO L93 Difference]: Finished difference Result 41 states and 76 transitions. [2022-03-15 15:46:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:46:31,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:46:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:31,924 INFO L225 Difference]: With dead ends: 41 [2022-03-15 15:46:31,924 INFO L226 Difference]: Without dead ends: 39 [2022-03-15 15:46:31,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:46:31,925 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:31,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-15 15:46:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-15 15:46:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-03-15 15:46:31,929 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-03-15 15:46:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:31,929 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-03-15 15:46:31,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-03-15 15:46:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:31,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:31,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:31,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 15:46:31,930 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 604624528, now seen corresponding path program 1 times [2022-03-15 15:46:31,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:31,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808342189] [2022-03-15 15:46:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:32,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:32,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808342189] [2022-03-15 15:46:32,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808342189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:32,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667721701] [2022-03-15 15:46:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:32,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:32,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:32,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 15:46:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:32,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:32,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:46:32,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:46:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:32,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:32,967 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:32,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2022-03-15 15:46:32,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2022-03-15 15:46:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:33,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667721701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:33,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:33,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:33,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668121074] [2022-03-15 15:46:33,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:33,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:33,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:33,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:33,012 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:33,401 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2022-03-15 15:46:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:46:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:33,403 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:46:33,403 INFO L226 Difference]: Without dead ends: 67 [2022-03-15 15:46:33,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:46:33,407 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:33,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 52 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 234 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:46:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-15 15:46:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-03-15 15:46:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2022-03-15 15:46:33,434 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2022-03-15 15:46:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:33,434 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2022-03-15 15:46:33,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2022-03-15 15:46:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:33,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:33,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:33,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 15:46:33,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:33,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1517376740, now seen corresponding path program 2 times [2022-03-15 15:46:33,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:33,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645904191] [2022-03-15 15:46:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:33,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:33,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645904191] [2022-03-15 15:46:33,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645904191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:33,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269515643] [2022-03-15 15:46:33,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:46:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:33,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:33,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:33,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:33,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:33,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 15:46:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:33,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:34,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:34,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:46:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:34,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:34,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:34,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:34,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:46:34,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:34,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:46:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:34,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269515643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:34,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:34,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:46:34,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121119371] [2022-03-15 15:46:34,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:34,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:46:34,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:46:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:34,638 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:34,720 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2022-03-15 15:46:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:34,721 INFO L225 Difference]: With dead ends: 63 [2022-03-15 15:46:34,721 INFO L226 Difference]: Without dead ends: 56 [2022-03-15 15:46:34,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:34,722 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:34,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-03-15 15:46:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-15 15:46:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-03-15 15:46:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0) internal successors, (94), 47 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 94 transitions. [2022-03-15 15:46:34,725 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 94 transitions. Word has length 14 [2022-03-15 15:46:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:34,725 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 94 transitions. [2022-03-15 15:46:34,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 94 transitions. [2022-03-15 15:46:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:34,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:34,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:34,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:34,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-15 15:46:34,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -550024168, now seen corresponding path program 3 times [2022-03-15 15:46:34,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:34,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974374413] [2022-03-15 15:46:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:34,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:35,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:35,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974374413] [2022-03-15 15:46:35,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974374413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:35,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684221053] [2022-03-15 15:46:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:46:35,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:35,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:35,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 15:46:35,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:46:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:35,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:35,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:35,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:35,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:35,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:35,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:35,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:46:35,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:35,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:46:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:35,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684221053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:35,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:35,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:46:35,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758577200] [2022-03-15 15:46:35,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:35,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:46:35,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:46:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:35,870 INFO L87 Difference]: Start difference. First operand 48 states and 94 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:35,994 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2022-03-15 15:46:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:35,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:35,995 INFO L225 Difference]: With dead ends: 63 [2022-03-15 15:46:35,995 INFO L226 Difference]: Without dead ends: 56 [2022-03-15 15:46:35,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:46:35,996 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:35,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-03-15 15:46:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-15 15:46:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-03-15 15:46:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0) internal successors, (94), 47 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 94 transitions. [2022-03-15 15:46:35,999 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 94 transitions. Word has length 14 [2022-03-15 15:46:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:35,999 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 94 transitions. [2022-03-15 15:46:35,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 94 transitions. [2022-03-15 15:46:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:36,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:36,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:36,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:36,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:36,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1598772368, now seen corresponding path program 4 times [2022-03-15 15:46:36,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:36,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977757795] [2022-03-15 15:46:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:36,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:36,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977757795] [2022-03-15 15:46:36,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977757795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:36,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646456334] [2022-03-15 15:46:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:46:36,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:36,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:36,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 15:46:36,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:46:36,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:36,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:36,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:36,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:36,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:36,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:37,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:37,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:46:37,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:37,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:46:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:37,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646456334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:37,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:37,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:37,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366515256] [2022-03-15 15:46:37,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:37,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:37,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:37,233 INFO L87 Difference]: Start difference. First operand 48 states and 94 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:37,377 INFO L93 Difference]: Finished difference Result 75 states and 141 transitions. [2022-03-15 15:46:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:37,378 INFO L225 Difference]: With dead ends: 75 [2022-03-15 15:46:37,378 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 15:46:37,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:37,379 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:37,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 15:46:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-03-15 15:46:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2022-03-15 15:46:37,381 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2022-03-15 15:46:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:37,381 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2022-03-15 15:46:37,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2022-03-15 15:46:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:37,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:37,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:37,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-15 15:46:37,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:37,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 631578460, now seen corresponding path program 5 times [2022-03-15 15:46:37,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:37,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911857230] [2022-03-15 15:46:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:37,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:37,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911857230] [2022-03-15 15:46:37,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911857230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:37,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876797428] [2022-03-15 15:46:37,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:46:37,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:37,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:37,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 15:46:37,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:37,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:37,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:46:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:37,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 15:46:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:37,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:38,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:38,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:46:38,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:38,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:46:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:38,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876797428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:38,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:38,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:46:38,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480767555] [2022-03-15 15:46:38,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:38,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:46:38,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:46:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:38,383 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:38,531 INFO L93 Difference]: Finished difference Result 71 states and 138 transitions. [2022-03-15 15:46:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:38,531 INFO L225 Difference]: With dead ends: 71 [2022-03-15 15:46:38,532 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:46:38,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:46:38,532 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:38,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 83 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 257 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-03-15 15:46:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:46:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2022-03-15 15:46:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-03-15 15:46:38,535 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 14 [2022-03-15 15:46:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:38,535 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-03-15 15:46:38,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-03-15 15:46:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:38,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:38,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:38,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:38,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 15:46:38,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1085575954, now seen corresponding path program 6 times [2022-03-15 15:46:38,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:38,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813089849] [2022-03-15 15:46:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:38,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:38,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813089849] [2022-03-15 15:46:38,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813089849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:38,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258912174] [2022-03-15 15:46:38,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:46:38,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:38,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:38,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:38,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 15:46:38,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:46:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:46:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:39,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:39,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:46:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:39,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-15 15:46:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:39,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:39,511 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:39,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 104 [2022-03-15 15:46:39,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-03-15 15:46:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:39,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258912174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:39,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:39,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:46:39,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16780343] [2022-03-15 15:46:39,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:39,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:46:39,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:46:39,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:39,574 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:39,807 INFO L93 Difference]: Finished difference Result 87 states and 163 transitions. [2022-03-15 15:46:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:46:39,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:39,807 INFO L225 Difference]: With dead ends: 87 [2022-03-15 15:46:39,807 INFO L226 Difference]: Without dead ends: 66 [2022-03-15 15:46:39,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:46:39,808 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:39,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-15 15:46:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2022-03-15 15:46:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2022-03-15 15:46:39,810 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2022-03-15 15:46:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:39,810 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2022-03-15 15:46:39,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2022-03-15 15:46:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:39,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:39,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:39,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 15:46:40,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:40,012 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1435822448, now seen corresponding path program 7 times [2022-03-15 15:46:40,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:40,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426652511] [2022-03-15 15:46:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:40,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:40,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426652511] [2022-03-15 15:46:40,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426652511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:40,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251031844] [2022-03-15 15:46:40,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:46:40,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:40,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:40,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 15:46:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:40,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:40,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:40,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:40,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:40,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:40,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 75 [2022-03-15 15:46:40,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:40,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2022-03-15 15:46:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:40,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251031844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:40,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:40,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:40,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601549306] [2022-03-15 15:46:40,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:40,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:40,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:40,938 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:41,356 INFO L93 Difference]: Finished difference Result 121 states and 216 transitions. [2022-03-15 15:46:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:46:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:41,357 INFO L225 Difference]: With dead ends: 121 [2022-03-15 15:46:41,357 INFO L226 Difference]: Without dead ends: 83 [2022-03-15 15:46:41,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:46:41,358 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:41,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 89 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-15 15:46:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2022-03-15 15:46:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 112 transitions. [2022-03-15 15:46:41,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 112 transitions. Word has length 14 [2022-03-15 15:46:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:41,360 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 112 transitions. [2022-03-15 15:46:41,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 112 transitions. [2022-03-15 15:46:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:41,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:41,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:41,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:41,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:41,562 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash 712974088, now seen corresponding path program 8 times [2022-03-15 15:46:41,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:41,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862825348] [2022-03-15 15:46:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:41,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:41,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862825348] [2022-03-15 15:46:41,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862825348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:41,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404949044] [2022-03-15 15:46:41,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:46:41,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:41,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:41,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 15:46:41,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:41,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:41,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:41,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:42,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:42,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:46:42,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:42,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:46:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:42,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404949044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:42,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:42,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:42,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112117167] [2022-03-15 15:46:42,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:42,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:42,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:42,484 INFO L87 Difference]: Start difference. First operand 55 states and 112 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:42,814 INFO L93 Difference]: Finished difference Result 94 states and 177 transitions. [2022-03-15 15:46:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:46:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:42,815 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:46:42,815 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:46:42,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:46:42,815 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:42,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-03-15 15:46:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:46:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2022-03-15 15:46:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2022-03-15 15:46:42,818 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 14 [2022-03-15 15:46:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:42,818 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2022-03-15 15:46:42,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2022-03-15 15:46:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:42,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:42,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:42,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 15:46:43,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 15:46:43,019 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1678168412, now seen corresponding path program 9 times [2022-03-15 15:46:43,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:43,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110191131] [2022-03-15 15:46:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:43,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:43,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110191131] [2022-03-15 15:46:43,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110191131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:43,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056069442] [2022-03-15 15:46:43,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:46:43,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:43,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:43,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 15:46:43,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:46:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:46:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:43,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:43,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:46:43,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:43,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:46:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:43,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:43,718 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:43,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-03-15 15:46:43,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 78 [2022-03-15 15:46:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:43,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056069442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:43,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:43,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:43,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530372714] [2022-03-15 15:46:43,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:43,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:43,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:43,769 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:43,847 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2022-03-15 15:46:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:43,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:43,863 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:46:43,864 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 15:46:43,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:43,864 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:43,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-03-15 15:46:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 15:46:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-03-15 15:46:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 121 transitions. [2022-03-15 15:46:43,867 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 121 transitions. Word has length 14 [2022-03-15 15:46:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:43,867 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 121 transitions. [2022-03-15 15:46:43,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 121 transitions. [2022-03-15 15:46:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:43,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:43,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:43,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 15:46:44,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 15:46:44,079 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1300719410, now seen corresponding path program 10 times [2022-03-15 15:46:44,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:44,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144745266] [2022-03-15 15:46:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:44,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:44,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144745266] [2022-03-15 15:46:44,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144745266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:44,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444668333] [2022-03-15 15:46:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:46:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:44,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:44,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 15:46:44,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:46:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:44,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:44,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:44,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:44,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:44,943 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:44,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:46:44,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:46:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:44,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444668333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:44,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:44,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:44,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536248080] [2022-03-15 15:46:44,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:44,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:44,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:44,991 INFO L87 Difference]: Start difference. First operand 58 states and 121 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:45,087 INFO L93 Difference]: Finished difference Result 84 states and 178 transitions. [2022-03-15 15:46:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:45,089 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:46:45,089 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:46:45,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:46:45,089 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:45,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-15 15:46:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:46:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2022-03-15 15:46:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 127 transitions. [2022-03-15 15:46:45,093 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 127 transitions. Word has length 14 [2022-03-15 15:46:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 127 transitions. [2022-03-15 15:46:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 127 transitions. [2022-03-15 15:46:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:45,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:45,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:45,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:45,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 15:46:45,307 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1457598756, now seen corresponding path program 11 times [2022-03-15 15:46:45,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:45,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560638881] [2022-03-15 15:46:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:45,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:45,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560638881] [2022-03-15 15:46:45,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560638881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:45,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369220660] [2022-03-15 15:46:45,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:46:45,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:45,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:45,441 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:45,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 15:46:45,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:45,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:45,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:45,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:45,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:45,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:45,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:45,984 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:45,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2022-03-15 15:46:45,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2022-03-15 15:46:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:45,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369220660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:45,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:45,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:46:45,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660541111] [2022-03-15 15:46:45,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:45,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:46:45,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:46:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:45,995 INFO L87 Difference]: Start difference. First operand 60 states and 127 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:46,206 INFO L93 Difference]: Finished difference Result 84 states and 175 transitions. [2022-03-15 15:46:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:46,206 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:46:46,206 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:46:46,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:46:46,207 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:46,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:46:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:46:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2022-03-15 15:46:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 127 transitions. [2022-03-15 15:46:46,209 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 127 transitions. Word has length 14 [2022-03-15 15:46:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:46,209 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 127 transitions. [2022-03-15 15:46:46,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 127 transitions. [2022-03-15 15:46:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:46,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:46,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:46,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:46,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 15:46:46,419 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2029053562, now seen corresponding path program 12 times [2022-03-15 15:46:46,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:46,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344977749] [2022-03-15 15:46:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:46,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:46,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344977749] [2022-03-15 15:46:46,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344977749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:46,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068346672] [2022-03-15 15:46:46,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:46:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:46,593 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:46,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:46:46,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:46,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 15:46:46,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:46,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:46:46,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:46,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:46,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:47,144 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:47,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:46:47,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:46:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:47,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068346672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:47,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:47,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:46:47,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132499496] [2022-03-15 15:46:47,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:47,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:46:47,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:46:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:46:47,189 INFO L87 Difference]: Start difference. First operand 60 states and 127 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:47,297 INFO L93 Difference]: Finished difference Result 86 states and 178 transitions. [2022-03-15 15:46:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:47,298 INFO L225 Difference]: With dead ends: 86 [2022-03-15 15:46:47,298 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 15:46:47,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:47,298 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:47,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-03-15 15:46:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 15:46:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-03-15 15:46:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2022-03-15 15:46:47,301 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 14 [2022-03-15 15:46:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2022-03-15 15:46:47,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2022-03-15 15:46:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:46:47,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:47,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:47,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:47,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 15:46:47,511 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash -953342406, now seen corresponding path program 13 times [2022-03-15 15:46:47,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:47,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543160878] [2022-03-15 15:46:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:47,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:47,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:47,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543160878] [2022-03-15 15:46:47,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543160878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:47,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941873289] [2022-03-15 15:46:47,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:46:47,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:47,645 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:47,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 15:46:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:46:47,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:47,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:46:47,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-15 15:46:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:47,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:48,125 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:48,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:46:48,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:46:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:48,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941873289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:48,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:48,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:46:48,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965509057] [2022-03-15 15:46:48,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:48,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:46:48,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:46:48,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:48,151 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:48,472 INFO L93 Difference]: Finished difference Result 105 states and 205 transitions. [2022-03-15 15:46:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:46:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:46:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:48,473 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:46:48,473 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 15:46:48,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:46:48,474 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:48,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 83 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:46:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 15:46:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-03-15 15:46:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 127 transitions. [2022-03-15 15:46:48,476 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 127 transitions. Word has length 14 [2022-03-15 15:46:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:48,476 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 127 transitions. [2022-03-15 15:46:48,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 127 transitions. [2022-03-15 15:46:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:48,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:48,476 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:48,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:48,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:48,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1510417967, now seen corresponding path program 14 times [2022-03-15 15:46:48,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:48,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179308389] [2022-03-15 15:46:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:48,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:48,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179308389] [2022-03-15 15:46:48,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179308389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:48,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914342662] [2022-03-15 15:46:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:46:48,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:48,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:48,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:48,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 15:46:48,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:48,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:48,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:46:48,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:46:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:48,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:48,906 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:48,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:46:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:48,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914342662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:48,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:48,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 15:46:48,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713554990] [2022-03-15 15:46:48,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:48,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:46:48,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:46:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:46:48,911 INFO L87 Difference]: Start difference. First operand 61 states and 127 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:48,999 INFO L93 Difference]: Finished difference Result 92 states and 183 transitions. [2022-03-15 15:46:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:49,000 INFO L225 Difference]: With dead ends: 92 [2022-03-15 15:46:49,000 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 15:46:49,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:46:49,001 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:49,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 72 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 15:46:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2022-03-15 15:46:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2022-03-15 15:46:49,003 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2022-03-15 15:46:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:49,003 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2022-03-15 15:46:49,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2022-03-15 15:46:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:49,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:49,003 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:49,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:49,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:49,208 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:49,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash -597665755, now seen corresponding path program 15 times [2022-03-15 15:46:49,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:49,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248602089] [2022-03-15 15:46:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:49,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:49,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:49,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248602089] [2022-03-15 15:46:49,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248602089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:49,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079373365] [2022-03-15 15:46:49,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:46:49,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:49,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:49,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:49,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 15:46:49,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:46:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:49,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:49,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:46:49,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:49,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:46:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:49,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:49,518 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:49,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:46:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:49,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079373365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:49,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:49,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:49,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231342501] [2022-03-15 15:46:49,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:49,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:49,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:49,524 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:49,570 INFO L93 Difference]: Finished difference Result 96 states and 193 transitions. [2022-03-15 15:46:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:49,571 INFO L225 Difference]: With dead ends: 96 [2022-03-15 15:46:49,571 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:46:49,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:49,572 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:49,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2022-03-15 15:46:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:46:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 62. [2022-03-15 15:46:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2022-03-15 15:46:49,574 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2022-03-15 15:46:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:49,574 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2022-03-15 15:46:49,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2022-03-15 15:46:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:49,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:49,575 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:49,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:49,783 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -516270127, now seen corresponding path program 16 times [2022-03-15 15:46:49,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:49,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744001056] [2022-03-15 15:46:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:49,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:49,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744001056] [2022-03-15 15:46:49,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744001056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:49,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872806442] [2022-03-15 15:46:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:46:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:49,850 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:49,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 15:46:49,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:46:49,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:49,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:49,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:49,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:50,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:50,093 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:50,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:46:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:50,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872806442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:50,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:50,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:46:50,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761734090] [2022-03-15 15:46:50,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:50,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:46:50,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:46:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:46:50,099 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:50,225 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2022-03-15 15:46:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:50,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:50,226 INFO L225 Difference]: With dead ends: 93 [2022-03-15 15:46:50,226 INFO L226 Difference]: Without dead ends: 93 [2022-03-15 15:46:50,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:50,226 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:50,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 83 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:46:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-15 15:46:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2022-03-15 15:46:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.15625) internal successors, (138), 64 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 138 transitions. [2022-03-15 15:46:50,228 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 138 transitions. Word has length 15 [2022-03-15 15:46:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:50,229 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 138 transitions. [2022-03-15 15:46:50,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 138 transitions. [2022-03-15 15:46:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:50,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:50,229 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:50,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:50,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 15:46:50,439 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1383719775, now seen corresponding path program 17 times [2022-03-15 15:46:50,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:50,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633626881] [2022-03-15 15:46:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:50,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:50,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633626881] [2022-03-15 15:46:50,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633626881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:50,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857879448] [2022-03-15 15:46:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:46:50,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:50,527 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:50,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 15:46:50,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:50,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:50,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:50,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:50,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:50,756 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:50,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:46:50,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:46:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:50,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857879448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:50,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:50,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:50,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229535617] [2022-03-15 15:46:50,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:50,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:50,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:50,772 INFO L87 Difference]: Start difference. First operand 65 states and 138 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:50,987 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2022-03-15 15:46:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:50,988 INFO L225 Difference]: With dead ends: 93 [2022-03-15 15:46:50,988 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 15:46:50,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:50,989 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:50,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 72 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 135 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:46:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 15:46:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 69. [2022-03-15 15:46:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 146 transitions. [2022-03-15 15:46:50,991 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 146 transitions. Word has length 15 [2022-03-15 15:46:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:50,991 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 146 transitions. [2022-03-15 15:46:50,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 146 transitions. [2022-03-15 15:46:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:50,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:50,991 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:51,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:51,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:51,198 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash 843846613, now seen corresponding path program 18 times [2022-03-15 15:46:51,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:51,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827385856] [2022-03-15 15:46:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:51,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:51,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:51,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827385856] [2022-03-15 15:46:51,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827385856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:51,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214003913] [2022-03-15 15:46:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:46:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:51,286 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:51,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 15:46:51,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:46:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:51,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:51,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:51,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:51,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:51,544 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:51,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:46:51,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:46:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:51,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214003913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:51,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:51,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:46:51,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212304574] [2022-03-15 15:46:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:51,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:46:51,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:51,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:46:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:46:51,560 INFO L87 Difference]: Start difference. First operand 69 states and 146 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:51,657 INFO L93 Difference]: Finished difference Result 78 states and 165 transitions. [2022-03-15 15:46:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:51,658 INFO L225 Difference]: With dead ends: 78 [2022-03-15 15:46:51,658 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 15:46:51,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:46:51,659 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:51,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-03-15 15:46:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 15:46:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2022-03-15 15:46:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2022-03-15 15:46:51,661 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2022-03-15 15:46:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2022-03-15 15:46:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2022-03-15 15:46:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:51,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:51,661 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:51,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:51,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:51,862 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 448924197, now seen corresponding path program 19 times [2022-03-15 15:46:51,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:51,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115212560] [2022-03-15 15:46:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:51,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:51,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115212560] [2022-03-15 15:46:51,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115212560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854256676] [2022-03-15 15:46:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:46:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:51,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:51,928 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:51,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 15:46:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:51,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:51,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:52,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:52,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:52,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:52,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:52,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:52,160 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:46:52,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:46:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:52,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854256676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:52,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:52,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:46:52,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362389847] [2022-03-15 15:46:52,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:52,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:46:52,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:46:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:46:52,168 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:52,236 INFO L93 Difference]: Finished difference Result 80 states and 168 transitions. [2022-03-15 15:46:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:52,237 INFO L225 Difference]: With dead ends: 80 [2022-03-15 15:46:52,237 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 15:46:52,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:46:52,238 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:52,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 50 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-03-15 15:46:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 15:46:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2022-03-15 15:46:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2022-03-15 15:46:52,239 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 15 [2022-03-15 15:46:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:52,240 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2022-03-15 15:46:52,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2022-03-15 15:46:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:52,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:52,240 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:52,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:52,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:52,451 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 885469183, now seen corresponding path program 20 times [2022-03-15 15:46:52,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:52,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646636836] [2022-03-15 15:46:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:52,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:52,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646636836] [2022-03-15 15:46:52,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646636836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:52,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858078520] [2022-03-15 15:46:52,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:46:52,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:52,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:52,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:52,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 15:46:52,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:52,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:52,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:46:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:52,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:46:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:52,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:52,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:52,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:46:52,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:52,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:46:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:52,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858078520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:52,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:52,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:46:52,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171648749] [2022-03-15 15:46:52,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:52,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:46:52,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:46:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:46:52,789 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:52,843 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2022-03-15 15:46:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:52,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:52,844 INFO L225 Difference]: With dead ends: 79 [2022-03-15 15:46:52,844 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 15:46:52,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:46:52,845 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:52,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-03-15 15:46:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 15:46:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2022-03-15 15:46:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2022-03-15 15:46:52,847 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 15 [2022-03-15 15:46:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:52,847 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2022-03-15 15:46:52,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2022-03-15 15:46:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:52,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:52,847 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:52,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:53,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 15:46:53,055 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash -235666129, now seen corresponding path program 21 times [2022-03-15 15:46:53,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:53,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738758099] [2022-03-15 15:46:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:53,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:53,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738758099] [2022-03-15 15:46:53,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738758099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:53,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801150062] [2022-03-15 15:46:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:46:53,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:53,135 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:53,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 15:46:53,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:46:53,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:53,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:46:53,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:53,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:46:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:53,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:46:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:53,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:53,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:53,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:46:53,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:53,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:46:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:53,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801150062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:53,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:53,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:46:53,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814002579] [2022-03-15 15:46:53,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:53,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:46:53,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:46:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:46:53,387 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:53,416 INFO L93 Difference]: Finished difference Result 74 states and 149 transitions. [2022-03-15 15:46:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:53,416 INFO L225 Difference]: With dead ends: 74 [2022-03-15 15:46:53,416 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:46:53,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:46:53,417 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:53,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-03-15 15:46:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:46:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-03-15 15:46:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 133 transitions. [2022-03-15 15:46:53,418 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 133 transitions. Word has length 15 [2022-03-15 15:46:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:53,419 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 133 transitions. [2022-03-15 15:46:53,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 133 transitions. [2022-03-15 15:46:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:53,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:53,419 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:53,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:53,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 15:46:53,620 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash 966864811, now seen corresponding path program 22 times [2022-03-15 15:46:53,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:53,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113961049] [2022-03-15 15:46:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:53,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:53,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113961049] [2022-03-15 15:46:53,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113961049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:53,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391955546] [2022-03-15 15:46:53,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:46:53,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:53,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:53,670 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:53,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 15:46:53,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:46:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:53,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:53,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:53,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:53,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:53,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:53,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:46:53,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:53,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:46:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:53,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391955546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:53,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:53,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:46:53,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214377385] [2022-03-15 15:46:53,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:53,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:46:53,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:46:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:53,871 INFO L87 Difference]: Start difference. First operand 64 states and 133 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:54,002 INFO L93 Difference]: Finished difference Result 89 states and 176 transitions. [2022-03-15 15:46:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:54,002 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:46:54,002 INFO L226 Difference]: Without dead ends: 89 [2022-03-15 15:46:54,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:46:54,003 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:54,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 74 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 190 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-03-15 15:46:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-15 15:46:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2022-03-15 15:46:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2022-03-15 15:46:54,005 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 15 [2022-03-15 15:46:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:54,005 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2022-03-15 15:46:54,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2022-03-15 15:46:54,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:54,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:54,005 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:54,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:54,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 15:46:54,215 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 99415163, now seen corresponding path program 23 times [2022-03-15 15:46:54,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:54,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951857085] [2022-03-15 15:46:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:54,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:54,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:54,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951857085] [2022-03-15 15:46:54,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951857085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:54,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105886122] [2022-03-15 15:46:54,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:46:54,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:54,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:54,282 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:54,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:54,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:54,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 15:46:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:54,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:54,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:54,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:54,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:54,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:54,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:46:54,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:54,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:46:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:54,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105886122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:54,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:54,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:54,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915988636] [2022-03-15 15:46:54,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:54,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:54,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:54,499 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:54,687 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2022-03-15 15:46:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:46:54,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:54,688 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:46:54,688 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:46:54,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:54,688 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:54,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 156 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-03-15 15:46:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:46:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2022-03-15 15:46:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 147 transitions. [2022-03-15 15:46:54,690 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 147 transitions. Word has length 15 [2022-03-15 15:46:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:54,690 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 147 transitions. [2022-03-15 15:46:54,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 147 transitions. [2022-03-15 15:46:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:54,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:54,691 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:54,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:54,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:54,895 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1967985745, now seen corresponding path program 24 times [2022-03-15 15:46:54,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:54,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99549289] [2022-03-15 15:46:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:54,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:54,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:54,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99549289] [2022-03-15 15:46:54,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99549289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:54,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972032691] [2022-03-15 15:46:54,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:46:54,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:54,969 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:54,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 15:46:54,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:46:54,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:54,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:46:54,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:55,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:55,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:46:55,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:55,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:46:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:55,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:55,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:46:55,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:55,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:46:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:55,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972032691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:55,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:55,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:46:55,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985571245] [2022-03-15 15:46:55,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:55,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:46:55,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:46:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:55,235 INFO L87 Difference]: Start difference. First operand 70 states and 147 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:55,307 INFO L93 Difference]: Finished difference Result 74 states and 153 transitions. [2022-03-15 15:46:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:55,307 INFO L225 Difference]: With dead ends: 74 [2022-03-15 15:46:55,307 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:46:55,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:55,308 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:55,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-15 15:46:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:46:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-03-15 15:46:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.123076923076923) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 138 transitions. [2022-03-15 15:46:55,310 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 138 transitions. Word has length 15 [2022-03-15 15:46:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:55,310 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 138 transitions. [2022-03-15 15:46:55,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 138 transitions. [2022-03-15 15:46:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:55,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:55,311 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:55,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:55,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:55,527 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1932059135, now seen corresponding path program 25 times [2022-03-15 15:46:55,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:55,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031807552] [2022-03-15 15:46:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:55,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:55,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:55,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031807552] [2022-03-15 15:46:55,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031807552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:55,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079158054] [2022-03-15 15:46:55,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:46:55,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:55,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:55,583 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:55,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 15:46:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:55,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:55,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:55,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:55,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:55,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:55,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:46:55,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:55,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:46:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:55,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079158054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:55,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:55,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:55,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314504954] [2022-03-15 15:46:55,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:55,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:55,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:55,799 INFO L87 Difference]: Start difference. First operand 66 states and 138 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:55,879 INFO L93 Difference]: Finished difference Result 75 states and 153 transitions. [2022-03-15 15:46:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:55,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:55,880 INFO L225 Difference]: With dead ends: 75 [2022-03-15 15:46:55,880 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:46:55,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:55,881 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:55,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-03-15 15:46:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:46:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2022-03-15 15:46:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 133 transitions. [2022-03-15 15:46:55,882 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 133 transitions. Word has length 15 [2022-03-15 15:46:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:55,882 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 133 transitions. [2022-03-15 15:46:55,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 133 transitions. [2022-03-15 15:46:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:55,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:55,883 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:55,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:56,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-15 15:46:56,083 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1139919309, now seen corresponding path program 26 times [2022-03-15 15:46:56,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:56,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39433910] [2022-03-15 15:46:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:56,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:56,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39433910] [2022-03-15 15:46:56,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39433910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:56,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682931471] [2022-03-15 15:46:56,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:46:56,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:56,158 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:56,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 15:46:56,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:56,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:56,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:56,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:56,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:56,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:56,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:56,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:46:56,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:56,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:46:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:56,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682931471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:56,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:56,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:46:56,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260197965] [2022-03-15 15:46:56,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:56,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:46:56,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:46:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:56,410 INFO L87 Difference]: Start difference. First operand 64 states and 133 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:56,571 INFO L93 Difference]: Finished difference Result 91 states and 180 transitions. [2022-03-15 15:46:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:56,572 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:56,572 INFO L225 Difference]: With dead ends: 91 [2022-03-15 15:46:56,572 INFO L226 Difference]: Without dead ends: 91 [2022-03-15 15:46:56,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:46:56,573 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:56,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-15 15:46:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2022-03-15 15:46:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 140 transitions. [2022-03-15 15:46:56,574 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 140 transitions. Word has length 15 [2022-03-15 15:46:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:56,575 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 140 transitions. [2022-03-15 15:46:56,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 140 transitions. [2022-03-15 15:46:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:56,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:56,575 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:56,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:56,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 15:46:56,792 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2007368957, now seen corresponding path program 27 times [2022-03-15 15:46:56,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:56,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059020283] [2022-03-15 15:46:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:56,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:56,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059020283] [2022-03-15 15:46:56,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059020283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:56,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501466934] [2022-03-15 15:46:56,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:46:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:56,865 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:56,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 15:46:56,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:46:56,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:46:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:56,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:56,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:46:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:56,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:46:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:56,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:57,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:57,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:46:57,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:57,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:46:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:57,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501466934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:57,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:57,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:57,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423684899] [2022-03-15 15:46:57,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:57,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:57,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:57,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:57,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:57,074 INFO L87 Difference]: Start difference. First operand 66 states and 140 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:57,182 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2022-03-15 15:46:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:46:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:57,183 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:46:57,183 INFO L226 Difference]: Without dead ends: 91 [2022-03-15 15:46:57,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:46:57,184 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:57,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-15 15:46:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2022-03-15 15:46:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2022-03-15 15:46:57,185 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2022-03-15 15:46:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:57,185 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2022-03-15 15:46:57,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2022-03-15 15:46:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:57,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:57,186 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:57,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:57,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:57,402 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash 220197431, now seen corresponding path program 28 times [2022-03-15 15:46:57,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:57,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814476167] [2022-03-15 15:46:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:57,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:57,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814476167] [2022-03-15 15:46:57,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814476167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:57,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26331995] [2022-03-15 15:46:57,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:46:57,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:57,476 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:57,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:46:57,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 15:46:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:57,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:57,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:57,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:57,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:57,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:57,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:46:57,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:57,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:46:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:57,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26331995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:57,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:57,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:46:57,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762412492] [2022-03-15 15:46:57,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:57,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:46:57,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:46:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:46:57,706 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:57,822 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2022-03-15 15:46:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:46:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:57,823 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:46:57,823 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:46:57,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:46:57,823 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:57,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 83 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:46:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2022-03-15 15:46:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2022-03-15 15:46:57,825 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2022-03-15 15:46:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:57,825 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2022-03-15 15:46:57,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2022-03-15 15:46:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:57,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:57,826 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:57,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:58,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:58,026 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash -174724985, now seen corresponding path program 29 times [2022-03-15 15:46:58,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:58,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834837584] [2022-03-15 15:46:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:58,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:58,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834837584] [2022-03-15 15:46:58,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834837584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:58,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660215267] [2022-03-15 15:46:58,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:46:58,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:58,099 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:58,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 15:46:58,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:46:58,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:58,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:58,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:46:58,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:58,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:46:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:58,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:58,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:58,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:46:58,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:58,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:46:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:58,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660215267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:58,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:58,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:58,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544606373] [2022-03-15 15:46:58,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:58,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:58,356 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:58,509 INFO L93 Difference]: Finished difference Result 95 states and 187 transitions. [2022-03-15 15:46:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:46:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:58,510 INFO L225 Difference]: With dead ends: 95 [2022-03-15 15:46:58,510 INFO L226 Difference]: Without dead ends: 93 [2022-03-15 15:46:58,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:46:58,510 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:58,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-15 15:46:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2022-03-15 15:46:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-03-15 15:46:58,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-03-15 15:46:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:58,512 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-03-15 15:46:58,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-03-15 15:46:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:58,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:58,512 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:58,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 15:46:58,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:58,713 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1925973329, now seen corresponding path program 30 times [2022-03-15 15:46:58,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:58,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9623042] [2022-03-15 15:46:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:58,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:58,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:58,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9623042] [2022-03-15 15:46:58,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9623042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:58,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086908639] [2022-03-15 15:46:58,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:46:58,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:58,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:58,774 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:58,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 15:46:58,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:46:58,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:46:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:46:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:58,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:58,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:46:58,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:58,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:46:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:58,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:58,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:58,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:46:58,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:58,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:46:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:59,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086908639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:59,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:59,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:46:59,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457885463] [2022-03-15 15:46:59,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:59,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:46:59,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:46:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:59,030 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:59,127 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2022-03-15 15:46:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:59,128 INFO L225 Difference]: With dead ends: 79 [2022-03-15 15:46:59,128 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 15:46:59,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:59,129 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:59,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 57 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:46:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 15:46:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2022-03-15 15:46:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2022-03-15 15:46:59,133 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 15 [2022-03-15 15:46:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:59,133 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2022-03-15 15:46:59,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2022-03-15 15:46:59,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:59,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:59,134 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:59,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 15:46:59,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 15:46:59,335 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash -709954787, now seen corresponding path program 31 times [2022-03-15 15:46:59,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:59,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363641812] [2022-03-15 15:46:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:59,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:59,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:46:59,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363641812] [2022-03-15 15:46:59,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363641812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:46:59,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630730332] [2022-03-15 15:46:59,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:46:59,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:46:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:46:59,425 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:46:59,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 15:46:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:46:59,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:46:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:46:59,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:59,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:46:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:46:59,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:46:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:59,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:46:59,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:59,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:46:59,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:46:59,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:46:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:46:59,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630730332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:46:59,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:46:59,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:46:59,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760430666] [2022-03-15 15:46:59,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:46:59,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:46:59,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:46:59,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:46:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:46:59,624 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:46:59,753 INFO L93 Difference]: Finished difference Result 73 states and 149 transitions. [2022-03-15 15:46:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:46:59,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:46:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:46:59,754 INFO L225 Difference]: With dead ends: 73 [2022-03-15 15:46:59,754 INFO L226 Difference]: Without dead ends: 69 [2022-03-15 15:46:59,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:46:59,754 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:46:59,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:46:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-15 15:46:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-03-15 15:46:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.123076923076923) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 138 transitions. [2022-03-15 15:46:59,756 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 138 transitions. Word has length 15 [2022-03-15 15:46:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:46:59,756 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 138 transitions. [2022-03-15 15:46:59,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:46:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 138 transitions. [2022-03-15 15:46:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:46:59,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:46:59,756 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:46:59,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 15:46:59,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 15:46:59,957 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:46:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:46:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1423092667, now seen corresponding path program 32 times [2022-03-15 15:46:59,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:46:59,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578524306] [2022-03-15 15:46:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:46:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:46:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:00,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:00,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578524306] [2022-03-15 15:47:00,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578524306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:00,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935696560] [2022-03-15 15:47:00,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:00,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:00,018 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:00,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 15:47:00,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:00,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:47:00,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:00,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:47:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:00,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:00,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:00,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:47:00,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:00,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:47:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:00,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935696560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:00,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:00,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:00,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663733227] [2022-03-15 15:47:00,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:00,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:00,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:00,240 INFO L87 Difference]: Start difference. First operand 66 states and 138 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:00,295 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2022-03-15 15:47:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:00,296 INFO L225 Difference]: With dead ends: 80 [2022-03-15 15:47:00,296 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:47:00,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:00,296 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:00,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:47:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:47:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-03-15 15:47:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 135 transitions. [2022-03-15 15:47:00,298 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 135 transitions. Word has length 15 [2022-03-15 15:47:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:00,298 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 135 transitions. [2022-03-15 15:47:00,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 135 transitions. [2022-03-15 15:47:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:00,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:00,299 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:00,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 15:47:00,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 15:47:00,499 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash -723078093, now seen corresponding path program 33 times [2022-03-15 15:47:00,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:00,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127722819] [2022-03-15 15:47:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:00,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:00,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127722819] [2022-03-15 15:47:00,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127722819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:00,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917335171] [2022-03-15 15:47:00,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:00,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:00,561 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:00,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 15:47:00,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:00,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:00,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:00,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:00,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:00,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:00,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:00,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:00,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:47:00,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:00,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:47:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:00,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917335171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:00,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:00,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:00,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104448836] [2022-03-15 15:47:00,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:00,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:00,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:00,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:00,808 INFO L87 Difference]: Start difference. First operand 65 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:00,956 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2022-03-15 15:47:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:47:00,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:00,957 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:47:00,957 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:47:00,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:47:00,957 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:00,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 93 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:47:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:47:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2022-03-15 15:47:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 135 transitions. [2022-03-15 15:47:00,959 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 135 transitions. Word has length 15 [2022-03-15 15:47:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:00,959 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 135 transitions. [2022-03-15 15:47:00,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 135 transitions. [2022-03-15 15:47:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:00,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:00,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:00,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:01,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 15:47:01,160 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 242116231, now seen corresponding path program 34 times [2022-03-15 15:47:01,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:01,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507946521] [2022-03-15 15:47:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:01,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:01,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507946521] [2022-03-15 15:47:01,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507946521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:01,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901176864] [2022-03-15 15:47:01,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:01,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:01,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:01,214 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:01,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 15:47:01,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:01,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:01,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:01,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:01,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:01,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:01,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:47:01,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:01,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:47:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:01,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901176864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:01,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:01,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:47:01,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230111234] [2022-03-15 15:47:01,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:01,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:47:01,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:47:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:01,477 INFO L87 Difference]: Start difference. First operand 65 states and 135 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:01,586 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2022-03-15 15:47:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:01,587 INFO L225 Difference]: With dead ends: 75 [2022-03-15 15:47:01,587 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:47:01,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:47:01,587 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:01,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 43 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:47:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:47:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-03-15 15:47:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.09375) internal successors, (134), 64 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 134 transitions. [2022-03-15 15:47:01,589 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 134 transitions. Word has length 15 [2022-03-15 15:47:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:01,589 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 134 transitions. [2022-03-15 15:47:01,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 134 transitions. [2022-03-15 15:47:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:01,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:01,589 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:01,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:01,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 15:47:01,790 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:01,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1465105083, now seen corresponding path program 35 times [2022-03-15 15:47:01,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:01,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517758139] [2022-03-15 15:47:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:01,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:01,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:01,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517758139] [2022-03-15 15:47:01,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517758139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:01,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746640423] [2022-03-15 15:47:01,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:01,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:01,895 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:01,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 15:47:01,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:47:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:01,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:01,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:01,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:02,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:02,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:02,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:02,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:02,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:47:02,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:02,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:47:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:02,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746640423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:02,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:02,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:02,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050274851] [2022-03-15 15:47:02,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:02,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:02,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:02,189 INFO L87 Difference]: Start difference. First operand 65 states and 134 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:02,273 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2022-03-15 15:47:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:02,273 INFO L225 Difference]: With dead ends: 82 [2022-03-15 15:47:02,273 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:47:02,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:02,274 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:02,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 81 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-03-15 15:47:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:47:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-03-15 15:47:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.09375) internal successors, (134), 64 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 134 transitions. [2022-03-15 15:47:02,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 134 transitions. Word has length 15 [2022-03-15 15:47:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:02,275 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 134 transitions. [2022-03-15 15:47:02,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 134 transitions. [2022-03-15 15:47:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:02,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:02,276 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:02,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:02,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:02,492 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash 66903657, now seen corresponding path program 36 times [2022-03-15 15:47:02,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:02,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614399481] [2022-03-15 15:47:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:02,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:02,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:02,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614399481] [2022-03-15 15:47:02,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614399481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:02,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471718912] [2022-03-15 15:47:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:02,559 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:02,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 15:47:02,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:47:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:47:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:02,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:02,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:47:02,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:02,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:47:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:02,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:02,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:02,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:47:02,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:02,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:47:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:02,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471718912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:02,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:02,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:47:02,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224429387] [2022-03-15 15:47:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:02,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:47:02,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:47:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:02,805 INFO L87 Difference]: Start difference. First operand 65 states and 134 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:02,842 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2022-03-15 15:47:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:02,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:02,843 INFO L225 Difference]: With dead ends: 70 [2022-03-15 15:47:02,843 INFO L226 Difference]: Without dead ends: 70 [2022-03-15 15:47:02,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:02,843 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:02,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-03-15 15:47:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-15 15:47:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-15 15:47:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2022-03-15 15:47:02,846 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2022-03-15 15:47:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:02,846 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2022-03-15 15:47:02,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2022-03-15 15:47:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:02,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:02,847 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:02,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:03,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:03,063 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1864667889, now seen corresponding path program 37 times [2022-03-15 15:47:03,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:03,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587319761] [2022-03-15 15:47:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:03,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:03,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587319761] [2022-03-15 15:47:03,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587319761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:03,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872177720] [2022-03-15 15:47:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:03,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:03,126 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 15:47:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:03,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:03,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:03,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:03,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:03,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:47:03,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:03,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:47:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:03,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872177720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:03,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:03,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:47:03,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010313209] [2022-03-15 15:47:03,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:47:03,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:47:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:03,350 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:03,490 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2022-03-15 15:47:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:47:03,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:03,491 INFO L225 Difference]: With dead ends: 70 [2022-03-15 15:47:03,491 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:47:03,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:47:03,492 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:03,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 57 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:47:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:47:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-03-15 15:47:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2022-03-15 15:47:03,494 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2022-03-15 15:47:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:03,495 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2022-03-15 15:47:03,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2022-03-15 15:47:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:03,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:03,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:03,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:03,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:03,713 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash 679051063, now seen corresponding path program 38 times [2022-03-15 15:47:03,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:03,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912901824] [2022-03-15 15:47:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:03,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:03,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:03,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912901824] [2022-03-15 15:47:03,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912901824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:03,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644129490] [2022-03-15 15:47:03,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:03,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:03,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:03,792 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:03,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 15:47:03,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:47:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:03,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:03,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:03,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:03,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:03,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:47:04,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:04,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:47:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:04,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644129490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:04,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:04,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:47:04,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77953751] [2022-03-15 15:47:04,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:47:04,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:47:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:04,031 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:04,074 INFO L93 Difference]: Finished difference Result 69 states and 139 transitions. [2022-03-15 15:47:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:04,075 INFO L225 Difference]: With dead ends: 69 [2022-03-15 15:47:04,075 INFO L226 Difference]: Without dead ends: 69 [2022-03-15 15:47:04,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:04,075 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:04,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 46 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-03-15 15:47:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-15 15:47:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-03-15 15:47:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2022-03-15 15:47:04,077 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2022-03-15 15:47:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:04,077 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2022-03-15 15:47:04,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2022-03-15 15:47:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:04,077 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:04,077 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:04,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:04,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-15 15:47:04,278 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1789626415, now seen corresponding path program 39 times [2022-03-15 15:47:04,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:04,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081035083] [2022-03-15 15:47:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:04,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:04,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081035083] [2022-03-15 15:47:04,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081035083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:04,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624543380] [2022-03-15 15:47:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:04,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:04,368 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:04,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 15:47:04,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:47:04,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:04,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:04,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:04,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:04,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:04,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:04,631 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:04,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:47:04,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:47:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:04,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624543380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:04,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:04,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:47:04,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222677671] [2022-03-15 15:47:04,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:04,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:47:04,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:47:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:04,653 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:04,820 INFO L93 Difference]: Finished difference Result 76 states and 156 transitions. [2022-03-15 15:47:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:04,821 INFO L225 Difference]: With dead ends: 76 [2022-03-15 15:47:04,821 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:47:04,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:47:04,821 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:04,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-03-15 15:47:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:47:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-03-15 15:47:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2022-03-15 15:47:04,823 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2022-03-15 15:47:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:04,823 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2022-03-15 15:47:04,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2022-03-15 15:47:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:04,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:04,824 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:04,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 15:47:05,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 15:47:05,024 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1637891233, now seen corresponding path program 40 times [2022-03-15 15:47:05,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:05,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489190458] [2022-03-15 15:47:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:05,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:05,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489190458] [2022-03-15 15:47:05,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489190458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:05,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13416311] [2022-03-15 15:47:05,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:05,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:05,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:05,104 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:05,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 15:47:05,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:05,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:05,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:05,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:05,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:05,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:05,335 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:05,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:05,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13416311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:05,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:05,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:47:05,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416148243] [2022-03-15 15:47:05,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:05,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:47:05,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:47:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:47:05,340 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:05,385 INFO L93 Difference]: Finished difference Result 76 states and 154 transitions. [2022-03-15 15:47:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:05,393 INFO L225 Difference]: With dead ends: 76 [2022-03-15 15:47:05,393 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:47:05,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:05,393 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:05,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 56 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-03-15 15:47:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:47:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-03-15 15:47:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 137 transitions. [2022-03-15 15:47:05,395 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 137 transitions. Word has length 15 [2022-03-15 15:47:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:05,395 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 137 transitions. [2022-03-15 15:47:05,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 137 transitions. [2022-03-15 15:47:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:05,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:05,395 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:05,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 15:47:05,611 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash -429509675, now seen corresponding path program 41 times [2022-03-15 15:47:05,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:05,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49894482] [2022-03-15 15:47:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:05,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:05,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49894482] [2022-03-15 15:47:05,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49894482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:05,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67850942] [2022-03-15 15:47:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:05,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:05,700 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:05,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 15:47:05,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:47:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:05,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:05,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:05,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:05,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:05,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:05,917 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:05,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:05,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67850942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:05,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:05,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:47:05,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417234449] [2022-03-15 15:47:05,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:05,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:47:05,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:47:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:05,922 INFO L87 Difference]: Start difference. First operand 67 states and 137 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:05,964 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2022-03-15 15:47:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:05,964 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:47:05,964 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:47:05,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:05,965 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:05,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-03-15 15:47:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:47:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-03-15 15:47:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2022-03-15 15:47:05,966 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2022-03-15 15:47:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2022-03-15 15:47:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2022-03-15 15:47:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:05,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:05,967 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:05,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 15:47:06,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 15:47:06,183 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:06,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1107139455, now seen corresponding path program 42 times [2022-03-15 15:47:06,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:06,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974804711] [2022-03-15 15:47:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:06,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:06,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:06,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974804711] [2022-03-15 15:47:06,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974804711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:06,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142374904] [2022-03-15 15:47:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:06,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:06,256 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:06,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 15:47:06,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:47:06,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:47:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:06,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:06,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:47:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:06,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:47:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:06,530 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:06,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:06,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142374904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:06,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:06,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:06,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067777641] [2022-03-15 15:47:06,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:06,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:06,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:06,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:06,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:06,536 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:06,566 INFO L93 Difference]: Finished difference Result 72 states and 148 transitions. [2022-03-15 15:47:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:06,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:06,567 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:47:06,567 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:47:06,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:06,567 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:06,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-03-15 15:47:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:47:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2022-03-15 15:47:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2022-03-15 15:47:06,569 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2022-03-15 15:47:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:06,569 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2022-03-15 15:47:06,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2022-03-15 15:47:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:06,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:06,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:06,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:06,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:06,770 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -824432091, now seen corresponding path program 43 times [2022-03-15 15:47:06,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:06,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628663571] [2022-03-15 15:47:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:06,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:06,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628663571] [2022-03-15 15:47:06,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628663571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:06,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927642601] [2022-03-15 15:47:06,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:06,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:06,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:06,861 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:06,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 15:47:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:06,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:06,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:06,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:06,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:07,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:07,102 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:07,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:47:07,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:47:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:07,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927642601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:07,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:07,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:47:07,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131017108] [2022-03-15 15:47:07,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:07,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:47:07,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:47:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:07,119 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:07,300 INFO L93 Difference]: Finished difference Result 75 states and 151 transitions. [2022-03-15 15:47:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:47:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:07,301 INFO L225 Difference]: With dead ends: 75 [2022-03-15 15:47:07,301 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:47:07,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:47:07,301 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:07,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 69 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-03-15 15:47:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:47:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-03-15 15:47:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2022-03-15 15:47:07,303 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2022-03-15 15:47:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:07,303 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2022-03-15 15:47:07,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2022-03-15 15:47:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:07,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:07,304 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:07,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 15:47:07,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 15:47:07,504 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1719286861, now seen corresponding path program 44 times [2022-03-15 15:47:07,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:07,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801271153] [2022-03-15 15:47:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:07,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:07,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:07,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801271153] [2022-03-15 15:47:07,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801271153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:07,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047606422] [2022-03-15 15:47:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:07,556 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:07,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 15:47:07,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:07,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:07,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:47:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:07,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:07,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:07,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:07,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:47:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:07,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:07,727 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:07,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:07,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047606422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:07,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:07,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:07,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015651875] [2022-03-15 15:47:07,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:07,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:07,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:07,731 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:07,748 INFO L93 Difference]: Finished difference Result 74 states and 158 transitions. [2022-03-15 15:47:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:07,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:07,748 INFO L225 Difference]: With dead ends: 74 [2022-03-15 15:47:07,748 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:47:07,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:07,749 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:07,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-03-15 15:47:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:47:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2022-03-15 15:47:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2022-03-15 15:47:07,767 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2022-03-15 15:47:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:07,767 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2022-03-15 15:47:07,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2022-03-15 15:47:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:07,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:07,768 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:07,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 15:47:07,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 15:47:07,983 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1039031305, now seen corresponding path program 45 times [2022-03-15 15:47:07,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:07,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881437123] [2022-03-15 15:47:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:08,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:08,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881437123] [2022-03-15 15:47:08,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881437123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:08,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220832614] [2022-03-15 15:47:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:08,040 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:08,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 15:47:08,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:08,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:47:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:08,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:08,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:08,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:08,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:08,277 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:08,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:08,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220832614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:08,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:08,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:08,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397601613] [2022-03-15 15:47:08,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:08,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:08,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:08,283 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:08,315 INFO L93 Difference]: Finished difference Result 78 states and 164 transitions. [2022-03-15 15:47:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:08,315 INFO L225 Difference]: With dead ends: 78 [2022-03-15 15:47:08,315 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 15:47:08,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:08,316 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:08,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-03-15 15:47:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 15:47:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2022-03-15 15:47:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2022-03-15 15:47:08,317 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2022-03-15 15:47:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:08,317 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2022-03-15 15:47:08,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2022-03-15 15:47:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:08,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:08,318 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:08,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 15:47:08,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-15 15:47:08,531 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1610486111, now seen corresponding path program 46 times [2022-03-15 15:47:08,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:08,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159112063] [2022-03-15 15:47:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:08,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:08,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159112063] [2022-03-15 15:47:08,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159112063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:08,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727335423] [2022-03-15 15:47:08,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:08,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:08,592 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:08,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 15:47:08,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:08,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:08,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:08,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:47:08,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:08,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:47:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:08,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:08,773 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:08,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:08,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727335423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:08,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:08,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:08,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140807766] [2022-03-15 15:47:08,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:08,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:08,777 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:08,810 INFO L93 Difference]: Finished difference Result 77 states and 157 transitions. [2022-03-15 15:47:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:47:08,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:08,811 INFO L225 Difference]: With dead ends: 77 [2022-03-15 15:47:08,811 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:47:08,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:08,811 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:08,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-03-15 15:47:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:47:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2022-03-15 15:47:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2022-03-15 15:47:08,813 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2022-03-15 15:47:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:08,813 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2022-03-15 15:47:08,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2022-03-15 15:47:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:08,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:08,813 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:08,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:09,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:09,023 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:09,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1359661893, now seen corresponding path program 47 times [2022-03-15 15:47:09,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:09,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151929531] [2022-03-15 15:47:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:09,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:09,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:09,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151929531] [2022-03-15 15:47:09,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151929531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:09,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827548909] [2022-03-15 15:47:09,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:09,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:09,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:09,121 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:09,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 15:47:09,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:09,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:09,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:09,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:47:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:09,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:47:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:09,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:09,375 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:09,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2022-03-15 15:47:09,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:47:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:09,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827548909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:09,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:09,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:47:09,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339726557] [2022-03-15 15:47:09,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:09,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:47:09,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:47:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:47:09,395 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:09,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:09,501 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2022-03-15 15:47:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:09,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:09,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:09,502 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:47:09,502 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:47:09,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:09,502 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:09,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-03-15 15:47:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:47:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2022-03-15 15:47:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2022-03-15 15:47:09,504 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2022-03-15 15:47:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:09,504 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2022-03-15 15:47:09,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2022-03-15 15:47:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:09,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:09,504 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:09,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 15:47:09,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:09,705 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1987935113, now seen corresponding path program 48 times [2022-03-15 15:47:09,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:09,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275588951] [2022-03-15 15:47:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:09,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:09,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275588951] [2022-03-15 15:47:09,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275588951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:09,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751830548] [2022-03-15 15:47:09,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:09,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:09,757 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:09,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 15:47:09,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:47:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:09,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:47:09,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:47:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:09,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:09,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:09,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:09,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751830548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:09,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:09,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:47:09,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408435813] [2022-03-15 15:47:09,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:09,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:47:09,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:47:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:47:09,939 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:09,992 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2022-03-15 15:47:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:09,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:09,993 INFO L225 Difference]: With dead ends: 98 [2022-03-15 15:47:09,993 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 15:47:09,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:47:09,993 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:09,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-03-15 15:47:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 15:47:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2022-03-15 15:47:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2022-03-15 15:47:09,995 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2022-03-15 15:47:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:09,995 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2022-03-15 15:47:09,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2022-03-15 15:47:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:09,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:09,995 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:10,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:10,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:10,196 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:10,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1922612871, now seen corresponding path program 49 times [2022-03-15 15:47:10,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:10,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888518468] [2022-03-15 15:47:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:10,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:10,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888518468] [2022-03-15 15:47:10,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888518468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:10,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662687582] [2022-03-15 15:47:10,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:10,276 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:10,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 15:47:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:10,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-15 15:47:10,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 15:47:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:10,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:10,429 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:10,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2022-03-15 15:47:10,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:47:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:10,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662687582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:10,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:10,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 15:47:10,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250306666] [2022-03-15 15:47:10,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:10,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:47:10,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:47:10,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:47:10,447 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:10,617 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2022-03-15 15:47:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:10,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:10,618 INFO L225 Difference]: With dead ends: 86 [2022-03-15 15:47:10,618 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:47:10,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:10,618 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:10,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:47:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:47:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2022-03-15 15:47:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2022-03-15 15:47:10,620 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2022-03-15 15:47:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:10,620 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2022-03-15 15:47:10,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2022-03-15 15:47:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:10,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:10,620 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:10,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:10,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 15:47:10,821 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1747331635, now seen corresponding path program 50 times [2022-03-15 15:47:10,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:10,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606728057] [2022-03-15 15:47:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:10,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:10,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606728057] [2022-03-15 15:47:10,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606728057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:10,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354279569] [2022-03-15 15:47:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:10,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:10,875 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:10,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 15:47:10,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:10,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:10,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:11,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:11,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:11,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:11,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:11,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:11,128 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:11,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:11,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354279569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:11,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:11,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:47:11,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240753899] [2022-03-15 15:47:11,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:11,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:47:11,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:47:11,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:11,134 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:11,243 INFO L93 Difference]: Finished difference Result 90 states and 173 transitions. [2022-03-15 15:47:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:11,243 INFO L225 Difference]: With dead ends: 90 [2022-03-15 15:47:11,243 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 15:47:11,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:11,244 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:11,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 63 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-03-15 15:47:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 15:47:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2022-03-15 15:47:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2022-03-15 15:47:11,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 15 [2022-03-15 15:47:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:11,245 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2022-03-15 15:47:11,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2022-03-15 15:47:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:11,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:11,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:11,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:11,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 15:47:11,446 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash 879881987, now seen corresponding path program 51 times [2022-03-15 15:47:11,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:11,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538359757] [2022-03-15 15:47:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:11,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:11,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:11,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538359757] [2022-03-15 15:47:11,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538359757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:11,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448315437] [2022-03-15 15:47:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:11,525 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:11,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 15:47:11,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:11,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:11,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:11,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:11,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:11,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:11,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:11,783 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:11,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:47:11,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:47:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:11,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448315437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:11,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:11,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:47:11,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66738987] [2022-03-15 15:47:11,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:47:11,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:47:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:11,800 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:11,942 INFO L93 Difference]: Finished difference Result 89 states and 169 transitions. [2022-03-15 15:47:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:11,942 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:47:11,942 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:47:11,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:47:11,943 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:11,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-03-15 15:47:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:47:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2022-03-15 15:47:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2022-03-15 15:47:11,945 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2022-03-15 15:47:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:11,945 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2022-03-15 15:47:11,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2022-03-15 15:47:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:11,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:11,945 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:11,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:12,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 15:47:12,161 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:12,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1187518921, now seen corresponding path program 52 times [2022-03-15 15:47:12,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:12,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485910006] [2022-03-15 15:47:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:12,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:12,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:12,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485910006] [2022-03-15 15:47:12,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485910006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:12,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68807123] [2022-03-15 15:47:12,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:12,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:12,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:12,234 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:12,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 15:47:12,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:12,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:12,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:12,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:12,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:12,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:12,472 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:12,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:47:12,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:47:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:12,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68807123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:12,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:12,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:47:12,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937509724] [2022-03-15 15:47:12,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:12,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:47:12,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:47:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:47:12,486 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:12,598 INFO L93 Difference]: Finished difference Result 74 states and 148 transitions. [2022-03-15 15:47:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:12,599 INFO L225 Difference]: With dead ends: 74 [2022-03-15 15:47:12,599 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:47:12,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:47:12,599 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:12,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 68 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-03-15 15:47:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:47:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2022-03-15 15:47:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2022-03-15 15:47:12,600 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2022-03-15 15:47:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:12,600 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2022-03-15 15:47:12,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2022-03-15 15:47:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:47:12,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:12,601 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:12,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 15:47:12,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-15 15:47:12,807 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1582441337, now seen corresponding path program 53 times [2022-03-15 15:47:12,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:12,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508043970] [2022-03-15 15:47:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:12,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:12,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508043970] [2022-03-15 15:47:12,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508043970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:12,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535370522] [2022-03-15 15:47:12,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:12,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:12,884 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:12,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 15:47:12,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:47:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:47:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:12,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:47:13,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:13,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:47:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:13,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:13,091 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:13,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:47:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:13,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535370522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:13,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:13,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:47:13,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554176056] [2022-03-15 15:47:13,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:13,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:47:13,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:47:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:47:13,095 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:13,168 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2022-03-15 15:47:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:47:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:47:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:13,169 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:47:13,169 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:47:13,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:47:13,169 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:13,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 77 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-03-15 15:47:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:47:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2022-03-15 15:47:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 114 transitions. [2022-03-15 15:47:13,170 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 114 transitions. Word has length 15 [2022-03-15 15:47:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:13,170 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 114 transitions. [2022-03-15 15:47:13,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 114 transitions. [2022-03-15 15:47:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:13,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:13,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:13,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 15:47:13,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 15:47:13,379 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash 391978466, now seen corresponding path program 54 times [2022-03-15 15:47:13,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:13,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650169577] [2022-03-15 15:47:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:13,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:13,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:13,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650169577] [2022-03-15 15:47:13,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650169577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:13,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829335579] [2022-03-15 15:47:13,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:13,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:13,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:13,539 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:13,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 15:47:13,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:47:13,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:13,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:13,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:47:13,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:13,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:13,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:14,186 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:14,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:47:14,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:47:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:14,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829335579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:14,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:14,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:14,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941538953] [2022-03-15 15:47:14,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:14,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:14,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:14,220 INFO L87 Difference]: Start difference. First operand 57 states and 114 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:14,349 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2022-03-15 15:47:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:47:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:14,350 INFO L225 Difference]: With dead ends: 111 [2022-03-15 15:47:14,350 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 15:47:14,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:14,350 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:14,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 126 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-03-15 15:47:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 15:47:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2022-03-15 15:47:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 129 transitions. [2022-03-15 15:47:14,352 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 129 transitions. Word has length 16 [2022-03-15 15:47:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 129 transitions. [2022-03-15 15:47:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 129 transitions. [2022-03-15 15:47:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:14,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:14,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:14,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:14,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 15:47:14,553 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1270674222, now seen corresponding path program 55 times [2022-03-15 15:47:14,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:14,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949586004] [2022-03-15 15:47:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:14,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:14,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949586004] [2022-03-15 15:47:14,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949586004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:14,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096382238] [2022-03-15 15:47:14,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:14,711 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:14,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 15:47:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:14,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:14,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:14,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:14,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:14,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:14,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:47:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:14,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:15,309 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:15,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2022-03-15 15:47:15,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2022-03-15 15:47:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:15,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096382238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:15,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:15,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:15,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624047911] [2022-03-15 15:47:15,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:15,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:15,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:15,331 INFO L87 Difference]: Start difference. First operand 65 states and 129 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:15,578 INFO L93 Difference]: Finished difference Result 107 states and 218 transitions. [2022-03-15 15:47:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:47:15,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:15,579 INFO L225 Difference]: With dead ends: 107 [2022-03-15 15:47:15,579 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:47:15,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:47:15,579 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:15,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 144 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2022-03-15 15:47:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:47:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2022-03-15 15:47:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2022-03-15 15:47:15,581 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 16 [2022-03-15 15:47:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2022-03-15 15:47:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2022-03-15 15:47:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:15,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:15,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:15,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 15:47:15,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:15,782 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1332113792, now seen corresponding path program 56 times [2022-03-15 15:47:15,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:15,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697449328] [2022-03-15 15:47:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:15,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:15,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:15,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697449328] [2022-03-15 15:47:15,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697449328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:15,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599528654] [2022-03-15 15:47:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:15,940 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:15,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 15:47:15,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:15,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:47:15,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:16,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:47:16,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:16,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:47:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:16,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:16,593 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:16,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 60 [2022-03-15 15:47:16,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2022-03-15 15:47:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:16,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599528654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:16,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:16,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:16,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731548187] [2022-03-15 15:47:16,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:16,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:16,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:16,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:16,628 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:16,809 INFO L93 Difference]: Finished difference Result 106 states and 216 transitions. [2022-03-15 15:47:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:47:16,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:16,809 INFO L225 Difference]: With dead ends: 106 [2022-03-15 15:47:16,809 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:47:16,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:16,810 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:16,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 171 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-03-15 15:47:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:47:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2022-03-15 15:47:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2022-03-15 15:47:16,811 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 16 [2022-03-15 15:47:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:16,811 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2022-03-15 15:47:16,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2022-03-15 15:47:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:16,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:16,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:16,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:17,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:17,012 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:17,013 INFO L85 PathProgramCache]: Analyzing trace with hash -385040622, now seen corresponding path program 57 times [2022-03-15 15:47:17,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:17,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924128186] [2022-03-15 15:47:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:17,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:17,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924128186] [2022-03-15 15:47:17,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924128186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:17,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913007536] [2022-03-15 15:47:17,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:17,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:17,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:17,171 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:17,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 15:47:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:47:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:17,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:47:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:17,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:47:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:17,738 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:17,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 60 [2022-03-15 15:47:17,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2022-03-15 15:47:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:17,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913007536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:17,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:17,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:17,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864259332] [2022-03-15 15:47:17,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:17,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:17,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:17,760 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:17,891 INFO L93 Difference]: Finished difference Result 113 states and 230 transitions. [2022-03-15 15:47:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:47:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:17,891 INFO L225 Difference]: With dead ends: 113 [2022-03-15 15:47:17,891 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:47:17,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:17,892 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:17,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 120 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:47:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:47:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2022-03-15 15:47:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2022-03-15 15:47:17,893 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 16 [2022-03-15 15:47:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:17,893 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2022-03-15 15:47:17,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2022-03-15 15:47:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:17,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:17,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:17,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 15:47:18,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:18,110 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1434358324, now seen corresponding path program 58 times [2022-03-15 15:47:18,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:18,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746538981] [2022-03-15 15:47:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:18,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:18,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746538981] [2022-03-15 15:47:18,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746538981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:18,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695617395] [2022-03-15 15:47:18,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:18,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:18,296 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:18,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 15:47:18,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:18,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:18,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:18,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:18,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:47:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:18,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:18,786 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:18,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2022-03-15 15:47:18,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-03-15 15:47:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:18,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695617395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:18,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:18,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:18,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424113555] [2022-03-15 15:47:18,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:18,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:18,801 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:18,980 INFO L93 Difference]: Finished difference Result 108 states and 214 transitions. [2022-03-15 15:47:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:47:18,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:18,981 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:47:18,981 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 15:47:18,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:47:18,981 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:18,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 194 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 314 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2022-03-15 15:47:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 15:47:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2022-03-15 15:47:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-03-15 15:47:18,983 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 16 [2022-03-15 15:47:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:18,983 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-03-15 15:47:18,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-03-15 15:47:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:18,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:18,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:19,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:19,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-15 15:47:19,200 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1769439616, now seen corresponding path program 59 times [2022-03-15 15:47:19,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:19,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606829335] [2022-03-15 15:47:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:19,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:19,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606829335] [2022-03-15 15:47:19,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606829335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:19,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667441757] [2022-03-15 15:47:19,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:19,373 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:19,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 15:47:19,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:19,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:19,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:19,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:19,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:19,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:19,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:47:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:19,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:20,046 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:20,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2022-03-15 15:47:20,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-03-15 15:47:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:20,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667441757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:20,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:20,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:20,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270715813] [2022-03-15 15:47:20,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:20,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:20,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:20,065 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:20,243 INFO L93 Difference]: Finished difference Result 102 states and 208 transitions. [2022-03-15 15:47:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:47:20,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:20,244 INFO L225 Difference]: With dead ends: 102 [2022-03-15 15:47:20,244 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 15:47:20,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:47:20,244 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:20,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 141 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-03-15 15:47:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 15:47:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2022-03-15 15:47:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0) internal successors, (162), 81 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 162 transitions. [2022-03-15 15:47:20,260 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 162 transitions. Word has length 16 [2022-03-15 15:47:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:20,260 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 162 transitions. [2022-03-15 15:47:20,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 162 transitions. [2022-03-15 15:47:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:20,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:20,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:20,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:20,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 15:47:20,462 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 52285202, now seen corresponding path program 60 times [2022-03-15 15:47:20,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:20,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281261136] [2022-03-15 15:47:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:20,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:20,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281261136] [2022-03-15 15:47:20,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281261136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:20,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043528274] [2022-03-15 15:47:20,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:20,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:20,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:20,596 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:20,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 15:47:20,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:47:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:20,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:20,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:20,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:47:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:20,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:47:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:21,133 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:21,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2022-03-15 15:47:21,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-03-15 15:47:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:21,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043528274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:21,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:21,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:21,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907388290] [2022-03-15 15:47:21,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:21,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:21,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:21,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:21,164 INFO L87 Difference]: Start difference. First operand 82 states and 162 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:21,259 INFO L93 Difference]: Finished difference Result 107 states and 221 transitions. [2022-03-15 15:47:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:47:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:21,259 INFO L225 Difference]: With dead ends: 107 [2022-03-15 15:47:21,260 INFO L226 Difference]: Without dead ends: 100 [2022-03-15 15:47:21,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:21,264 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:21,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 108 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-03-15 15:47:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-15 15:47:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2022-03-15 15:47:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 81 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 164 transitions. [2022-03-15 15:47:21,272 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 164 transitions. Word has length 16 [2022-03-15 15:47:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:21,272 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 164 transitions. [2022-03-15 15:47:21,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 164 transitions. [2022-03-15 15:47:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:21,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:21,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:21,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:21,487 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -297961292, now seen corresponding path program 61 times [2022-03-15 15:47:21,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:21,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860040115] [2022-03-15 15:47:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:21,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:21,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860040115] [2022-03-15 15:47:21,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860040115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:21,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531570032] [2022-03-15 15:47:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:21,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:21,701 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:21,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 15:47:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:21,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:21,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:21,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:21,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:21,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:22,255 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:47:22,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2022-03-15 15:47:22,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2022-03-15 15:47:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:22,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531570032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:22,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:22,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:22,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75217146] [2022-03-15 15:47:22,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:22,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:22,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:22,276 INFO L87 Difference]: Start difference. First operand 82 states and 164 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:22,466 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2022-03-15 15:47:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:47:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:22,467 INFO L225 Difference]: With dead ends: 110 [2022-03-15 15:47:22,467 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:47:22,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:47:22,468 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:22,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 124 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 211 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-03-15 15:47:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:47:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-03-15 15:47:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 81 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 164 transitions. [2022-03-15 15:47:22,470 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 164 transitions. Word has length 16 [2022-03-15 15:47:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:22,470 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 164 transitions. [2022-03-15 15:47:22,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 164 transitions. [2022-03-15 15:47:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:22,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:22,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:22,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 15:47:22,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:22,686 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1377474034, now seen corresponding path program 62 times [2022-03-15 15:47:22,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:22,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132411704] [2022-03-15 15:47:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:22,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:22,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132411704] [2022-03-15 15:47:22,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132411704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:22,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950661715] [2022-03-15 15:47:22,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:22,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:22,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:22,827 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:22,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 15:47:22,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:22,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:23,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:47:23,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:23,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:47:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:23,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:23,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:23,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:23,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:23,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:23,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950661715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:23,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:23,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:23,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949715676] [2022-03-15 15:47:23,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:23,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:23,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:23,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:23,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:23,593 INFO L87 Difference]: Start difference. First operand 82 states and 164 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:23,837 INFO L93 Difference]: Finished difference Result 125 states and 246 transitions. [2022-03-15 15:47:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:47:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:23,837 INFO L225 Difference]: With dead ends: 125 [2022-03-15 15:47:23,837 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 15:47:23,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:23,838 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:23,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 130 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-03-15 15:47:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 15:47:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 86. [2022-03-15 15:47:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 85 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 173 transitions. [2022-03-15 15:47:23,840 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 173 transitions. Word has length 16 [2022-03-15 15:47:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:23,840 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 173 transitions. [2022-03-15 15:47:23,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 173 transitions. [2022-03-15 15:47:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:23,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:23,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:23,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:24,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 15:47:24,041 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1225313980, now seen corresponding path program 63 times [2022-03-15 15:47:24,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:24,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614372413] [2022-03-15 15:47:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:24,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:24,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:24,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614372413] [2022-03-15 15:47:24,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614372413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:24,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411580800] [2022-03-15 15:47:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:24,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:24,167 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:24,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 15:47:24,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:24,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:24,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:24,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:47:24,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:24,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:47:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:24,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:24,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:24,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:24,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:24,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:24,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411580800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:24,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:24,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:24,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39864210] [2022-03-15 15:47:24,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:24,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:24,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:24,871 INFO L87 Difference]: Start difference. First operand 86 states and 173 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:25,105 INFO L93 Difference]: Finished difference Result 121 states and 238 transitions. [2022-03-15 15:47:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:47:25,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:25,120 INFO L225 Difference]: With dead ends: 121 [2022-03-15 15:47:25,120 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 15:47:25,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:25,121 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:25,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 154 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 475 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-03-15 15:47:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 15:47:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 84. [2022-03-15 15:47:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.036144578313253) internal successors, (169), 83 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 169 transitions. [2022-03-15 15:47:25,131 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 169 transitions. Word has length 16 [2022-03-15 15:47:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:25,132 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 169 transitions. [2022-03-15 15:47:25,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2022-03-15 15:47:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:25,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:25,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:25,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:25,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 15:47:25,347 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1042392742, now seen corresponding path program 64 times [2022-03-15 15:47:25,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:25,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323222577] [2022-03-15 15:47:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:25,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:25,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323222577] [2022-03-15 15:47:25,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323222577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:25,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058414635] [2022-03-15 15:47:25,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:25,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:25,500 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:25,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 15:47:25,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:25,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:25,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:25,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:25,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:26,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:26,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2022-03-15 15:47:26,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:26,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2022-03-15 15:47:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:26,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058414635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:26,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:26,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:26,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535960332] [2022-03-15 15:47:26,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:26,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:26,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:26,080 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:26,316 INFO L93 Difference]: Finished difference Result 122 states and 241 transitions. [2022-03-15 15:47:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:47:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:26,317 INFO L225 Difference]: With dead ends: 122 [2022-03-15 15:47:26,317 INFO L226 Difference]: Without dead ends: 115 [2022-03-15 15:47:26,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:47:26,317 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:26,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 147 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 424 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-03-15 15:47:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-15 15:47:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2022-03-15 15:47:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 84 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 172 transitions. [2022-03-15 15:47:26,319 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 172 transitions. Word has length 16 [2022-03-15 15:47:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:26,320 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 172 transitions. [2022-03-15 15:47:26,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 172 transitions. [2022-03-15 15:47:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:26,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:26,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:26,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-15 15:47:26,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:26,536 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1185173646, now seen corresponding path program 65 times [2022-03-15 15:47:26,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:26,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24804107] [2022-03-15 15:47:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:26,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:26,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:26,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24804107] [2022-03-15 15:47:26,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24804107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:26,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398851532] [2022-03-15 15:47:26,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:26,684 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:26,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 15:47:26,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:47:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:26,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:26,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:26,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:26,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:26,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:27,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:27,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 85 [2022-03-15 15:47:27,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:27,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 61 [2022-03-15 15:47:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:27,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398851532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:27,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:27,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:27,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584090015] [2022-03-15 15:47:27,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:27,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:27,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:27,511 INFO L87 Difference]: Start difference. First operand 85 states and 172 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:27,641 INFO L93 Difference]: Finished difference Result 119 states and 236 transitions. [2022-03-15 15:47:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:47:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:27,641 INFO L225 Difference]: With dead ends: 119 [2022-03-15 15:47:27,642 INFO L226 Difference]: Without dead ends: 112 [2022-03-15 15:47:27,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:27,642 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:27,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 107 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-03-15 15:47:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-15 15:47:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2022-03-15 15:47:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.024390243902439) internal successors, (166), 82 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 166 transitions. [2022-03-15 15:47:27,644 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 166 transitions. Word has length 16 [2022-03-15 15:47:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:27,644 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 166 transitions. [2022-03-15 15:47:27,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 166 transitions. [2022-03-15 15:47:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:27,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:27,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:27,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:27,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-15 15:47:27,845 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1145790434, now seen corresponding path program 66 times [2022-03-15 15:47:27,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:27,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583737701] [2022-03-15 15:47:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:27,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:28,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:28,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583737701] [2022-03-15 15:47:28,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583737701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:28,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420641919] [2022-03-15 15:47:28,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:28,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:28,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:28,005 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:28,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 15:47:28,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:47:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:28,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:28,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:47:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:28,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:47:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:28,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:28,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:28,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:47:28,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:28,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:47:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:28,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420641919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:28,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:28,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:28,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154684767] [2022-03-15 15:47:28,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:28,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:28,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:28,703 INFO L87 Difference]: Start difference. First operand 83 states and 166 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:28,882 INFO L93 Difference]: Finished difference Result 154 states and 297 transitions. [2022-03-15 15:47:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:47:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:28,883 INFO L225 Difference]: With dead ends: 154 [2022-03-15 15:47:28,883 INFO L226 Difference]: Without dead ends: 133 [2022-03-15 15:47:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:47:28,884 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 189 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 396 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-15 15:47:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-15 15:47:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2022-03-15 15:47:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 187 transitions. [2022-03-15 15:47:28,886 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 187 transitions. Word has length 16 [2022-03-15 15:47:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 187 transitions. [2022-03-15 15:47:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 187 transitions. [2022-03-15 15:47:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:28,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:28,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:28,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:29,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:29,102 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1227186062, now seen corresponding path program 67 times [2022-03-15 15:47:29,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:29,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063024476] [2022-03-15 15:47:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:29,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:29,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063024476] [2022-03-15 15:47:29,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063024476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:29,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63622680] [2022-03-15 15:47:29,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:29,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:29,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:29,246 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:29,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 15:47:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:29,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:29,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:29,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:29,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:29,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:29,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:47:29,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:29,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:47:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:29,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63622680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:29,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:29,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:47:29,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808150696] [2022-03-15 15:47:29,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:29,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:47:29,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:29,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:47:29,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:47:29,845 INFO L87 Difference]: Start difference. First operand 90 states and 187 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:30,170 INFO L93 Difference]: Finished difference Result 185 states and 354 transitions. [2022-03-15 15:47:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:47:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:30,171 INFO L225 Difference]: With dead ends: 185 [2022-03-15 15:47:30,171 INFO L226 Difference]: Without dead ends: 164 [2022-03-15 15:47:30,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:47:30,171 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:30,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 239 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:47:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-15 15:47:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 93. [2022-03-15 15:47:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.152173913043478) internal successors, (198), 92 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 198 transitions. [2022-03-15 15:47:30,173 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 198 transitions. Word has length 16 [2022-03-15 15:47:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:30,173 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 198 transitions. [2022-03-15 15:47:30,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 198 transitions. [2022-03-15 15:47:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:30,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:30,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:30,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 15:47:30,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:30,387 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1650036084, now seen corresponding path program 68 times [2022-03-15 15:47:30,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:30,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054844108] [2022-03-15 15:47:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:30,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:30,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:30,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054844108] [2022-03-15 15:47:30,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054844108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:30,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103342863] [2022-03-15 15:47:30,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:30,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:30,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:30,578 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:30,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 15:47:30,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:30,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:30,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:30,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:30,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:47:30,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:30,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:47:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:30,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:31,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:31,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:31,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:31,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:31,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103342863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:31,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:31,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:31,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471083879] [2022-03-15 15:47:31,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:31,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:31,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:31,295 INFO L87 Difference]: Start difference. First operand 93 states and 198 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:31,624 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2022-03-15 15:47:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:47:31,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:31,624 INFO L225 Difference]: With dead ends: 156 [2022-03-15 15:47:31,624 INFO L226 Difference]: Without dead ends: 150 [2022-03-15 15:47:31,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:47:31,625 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:31,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 141 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 297 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-03-15 15:47:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-15 15:47:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2022-03-15 15:47:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1714285714285713) internal successors, (228), 105 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 228 transitions. [2022-03-15 15:47:31,627 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 228 transitions. Word has length 16 [2022-03-15 15:47:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:31,627 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 228 transitions. [2022-03-15 15:47:31,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 228 transitions. [2022-03-15 15:47:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:31,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:31,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:31,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:31,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-15 15:47:31,828 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1759297612, now seen corresponding path program 69 times [2022-03-15 15:47:31,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:31,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808591608] [2022-03-15 15:47:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:32,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:32,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808591608] [2022-03-15 15:47:32,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808591608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:32,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127568962] [2022-03-15 15:47:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:32,013 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:32,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:32,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 15:47:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:47:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:32,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:47:32,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:32,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:47:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:32,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:32,707 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:47:32,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:47:32,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:47:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:32,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127568962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:32,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:32,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:32,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416049275] [2022-03-15 15:47:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:32,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:32,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:32,758 INFO L87 Difference]: Start difference. First operand 106 states and 228 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:33,138 INFO L93 Difference]: Finished difference Result 210 states and 414 transitions. [2022-03-15 15:47:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:47:33,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:33,139 INFO L225 Difference]: With dead ends: 210 [2022-03-15 15:47:33,139 INFO L226 Difference]: Without dead ends: 186 [2022-03-15 15:47:33,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:47:33,139 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:33,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 331 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 753 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-03-15 15:47:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-15 15:47:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 108. [2022-03-15 15:47:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.2523364485981308) internal successors, (241), 107 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 241 transitions. [2022-03-15 15:47:33,141 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 241 transitions. Word has length 16 [2022-03-15 15:47:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:33,142 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 241 transitions. [2022-03-15 15:47:33,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 241 transitions. [2022-03-15 15:47:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:33,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:33,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:33,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:33,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:33,358 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1985117376, now seen corresponding path program 70 times [2022-03-15 15:47:33,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:33,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887265864] [2022-03-15 15:47:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:33,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:33,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887265864] [2022-03-15 15:47:33,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887265864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:33,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859336511] [2022-03-15 15:47:33,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:33,472 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:33,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 15:47:33,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:33,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:33,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:33,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:33,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:33,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:47:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:33,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:34,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:34,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 15:47:34,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:34,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 15:47:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:34,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859336511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:34,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:34,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:34,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910053157] [2022-03-15 15:47:34,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:34,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:34,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:34,210 INFO L87 Difference]: Start difference. First operand 108 states and 241 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:34,448 INFO L93 Difference]: Finished difference Result 147 states and 319 transitions. [2022-03-15 15:47:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:47:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:34,448 INFO L225 Difference]: With dead ends: 147 [2022-03-15 15:47:34,448 INFO L226 Difference]: Without dead ends: 133 [2022-03-15 15:47:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:47:34,449 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:34,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-15 15:47:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-15 15:47:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2022-03-15 15:47:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.259259259259259) internal successors, (244), 108 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 244 transitions. [2022-03-15 15:47:34,451 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 244 transitions. Word has length 16 [2022-03-15 15:47:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:34,451 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 244 transitions. [2022-03-15 15:47:34,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 244 transitions. [2022-03-15 15:47:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:34,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:34,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:34,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:34,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:34,652 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash -82283532, now seen corresponding path program 71 times [2022-03-15 15:47:34,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:34,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427731673] [2022-03-15 15:47:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:34,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:34,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:34,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427731673] [2022-03-15 15:47:34,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427731673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:34,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126868711] [2022-03-15 15:47:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:34,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:34,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:34,836 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:34,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 15:47:34,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:47:34,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:34,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:34,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:34,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:35,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:35,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:35,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:35,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:35,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:35,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126868711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:35,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:35,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:35,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280638734] [2022-03-15 15:47:35,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:35,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:35,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:35,623 INFO L87 Difference]: Start difference. First operand 109 states and 244 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:35,975 INFO L93 Difference]: Finished difference Result 166 states and 349 transitions. [2022-03-15 15:47:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:47:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:35,976 INFO L225 Difference]: With dead ends: 166 [2022-03-15 15:47:35,976 INFO L226 Difference]: Without dead ends: 150 [2022-03-15 15:47:35,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:47:35,976 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:35,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 171 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 450 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-03-15 15:47:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-15 15:47:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2022-03-15 15:47:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.2818181818181817) internal successors, (251), 110 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 251 transitions. [2022-03-15 15:47:35,979 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 251 transitions. Word has length 16 [2022-03-15 15:47:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:35,979 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 251 transitions. [2022-03-15 15:47:35,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 251 transitions. [2022-03-15 15:47:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:35,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:35,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:35,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:36,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:36,196 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1007465024, now seen corresponding path program 72 times [2022-03-15 15:47:36,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:36,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506701107] [2022-03-15 15:47:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:36,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:36,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506701107] [2022-03-15 15:47:36,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506701107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:36,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881310357] [2022-03-15 15:47:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:36,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:36,315 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:36,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 15:47:36,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:47:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:36,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:36,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:36,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:36,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:36,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:36,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 82 [2022-03-15 15:47:36,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:36,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2022-03-15 15:47:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:36,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881310357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:36,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:36,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:36,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764362401] [2022-03-15 15:47:36,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:36,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:36,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:36,848 INFO L87 Difference]: Start difference. First operand 111 states and 251 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:37,144 INFO L93 Difference]: Finished difference Result 178 states and 373 transitions. [2022-03-15 15:47:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:47:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:37,146 INFO L225 Difference]: With dead ends: 178 [2022-03-15 15:47:37,146 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 15:47:37,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:47:37,146 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:37,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 205 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 527 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-03-15 15:47:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 15:47:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 116. [2022-03-15 15:47:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 115 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2022-03-15 15:47:37,155 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 16 [2022-03-15 15:47:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:37,155 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2022-03-15 15:47:37,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2022-03-15 15:47:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:37,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:37,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:37,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:37,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 15:47:37,371 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1220101364, now seen corresponding path program 73 times [2022-03-15 15:47:37,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:37,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050906833] [2022-03-15 15:47:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:37,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:37,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050906833] [2022-03-15 15:47:37,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050906833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:37,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519374373] [2022-03-15 15:47:37,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:37,520 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:37,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 15:47:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:37,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:37,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:37,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:37,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:37,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:37,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:38,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:38,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 78 [2022-03-15 15:47:38,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:38,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 58 [2022-03-15 15:47:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:38,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519374373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:38,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:38,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:38,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272584392] [2022-03-15 15:47:38,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:38,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:38,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:38,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:38,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:38,270 INFO L87 Difference]: Start difference. First operand 116 states and 264 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:38,505 INFO L93 Difference]: Finished difference Result 172 states and 362 transitions. [2022-03-15 15:47:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:47:38,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:38,506 INFO L225 Difference]: With dead ends: 172 [2022-03-15 15:47:38,506 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 15:47:38,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:47:38,506 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:38,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 164 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 452 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-03-15 15:47:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 15:47:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2022-03-15 15:47:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 268 transitions. [2022-03-15 15:47:38,508 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 268 transitions. Word has length 16 [2022-03-15 15:47:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:38,509 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 268 transitions. [2022-03-15 15:47:38,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 268 transitions. [2022-03-15 15:47:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:38,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:38,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:38,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:38,723 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -926069396, now seen corresponding path program 74 times [2022-03-15 15:47:38,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:38,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750300172] [2022-03-15 15:47:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:38,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:38,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:38,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750300172] [2022-03-15 15:47:38,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750300172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:38,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640820336] [2022-03-15 15:47:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:38,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:38,890 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:38,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 15:47:38,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:38,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:39,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:39,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:39,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:39,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:39,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:39,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:47:39,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:39,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:47:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:39,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640820336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:39,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:39,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:47:39,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059842253] [2022-03-15 15:47:39,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:39,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:47:39,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:39,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:47:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:39,654 INFO L87 Difference]: Start difference. First operand 117 states and 268 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:40,348 INFO L93 Difference]: Finished difference Result 220 states and 442 transitions. [2022-03-15 15:47:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:47:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:40,349 INFO L225 Difference]: With dead ends: 220 [2022-03-15 15:47:40,349 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:47:40,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:47:40,349 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:40,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 194 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:47:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:47:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 119. [2022-03-15 15:47:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.3389830508474576) internal successors, (276), 118 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 276 transitions. [2022-03-15 15:47:40,352 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 276 transitions. Word has length 16 [2022-03-15 15:47:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:40,352 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 276 transitions. [2022-03-15 15:47:40,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 276 transitions. [2022-03-15 15:47:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:40,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:40,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:40,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:40,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:40,568 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:40,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1262113780, now seen corresponding path program 75 times [2022-03-15 15:47:40,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:40,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600756927] [2022-03-15 15:47:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:40,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:40,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:40,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600756927] [2022-03-15 15:47:40,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600756927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:40,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561104326] [2022-03-15 15:47:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:40,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:40,710 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:40,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 15:47:40,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:47:40,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:40,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:40,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:40,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:41,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:41,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:41,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:41,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:41,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561104326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:41,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:41,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:41,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221745702] [2022-03-15 15:47:41,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:41,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:41,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:41,450 INFO L87 Difference]: Start difference. First operand 119 states and 276 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:41,927 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2022-03-15 15:47:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:47:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:41,928 INFO L225 Difference]: With dead ends: 193 [2022-03-15 15:47:41,928 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 15:47:41,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:47:41,928 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:41,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 155 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:47:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 15:47:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2022-03-15 15:47:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.346774193548387) internal successors, (291), 124 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 291 transitions. [2022-03-15 15:47:41,931 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 291 transitions. Word has length 16 [2022-03-15 15:47:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:41,931 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 291 transitions. [2022-03-15 15:47:41,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 291 transitions. [2022-03-15 15:47:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:41,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:41,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:41,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 15:47:42,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-03-15 15:47:42,139 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 801413612, now seen corresponding path program 76 times [2022-03-15 15:47:42,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:42,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730829012] [2022-03-15 15:47:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:42,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:42,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730829012] [2022-03-15 15:47:42,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730829012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:42,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994534176] [2022-03-15 15:47:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:42,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:42,304 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:42,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 15:47:42,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:42,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:42,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:42,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:42,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:47:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:42,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:42,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:42,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 15:47:42,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:42,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 15:47:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:42,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994534176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:42,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:42,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:42,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620745368] [2022-03-15 15:47:42,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:42,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:42,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:42,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:42,992 INFO L87 Difference]: Start difference. First operand 125 states and 291 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:43,429 INFO L93 Difference]: Finished difference Result 185 states and 405 transitions. [2022-03-15 15:47:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:47:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:43,430 INFO L225 Difference]: With dead ends: 185 [2022-03-15 15:47:43,430 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:47:43,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:47:43,430 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:43,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 204 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 558 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-03-15 15:47:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:47:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 134. [2022-03-15 15:47:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.3609022556390977) internal successors, (314), 133 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 314 transitions. [2022-03-15 15:47:43,432 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 314 transitions. Word has length 16 [2022-03-15 15:47:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:43,433 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 314 transitions. [2022-03-15 15:47:43,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 314 transitions. [2022-03-15 15:47:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:43,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:43,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:43,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:43,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:43,634 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1136494904, now seen corresponding path program 77 times [2022-03-15 15:47:43,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:43,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544807506] [2022-03-15 15:47:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:43,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:43,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544807506] [2022-03-15 15:47:43,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544807506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:43,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59340451] [2022-03-15 15:47:43,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:43,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:43,805 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:43,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 15:47:43,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:43,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:43,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:43,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:43,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:43,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:43,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 15:47:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:44,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:44,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:44,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 15:47:44,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:44,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 15:47:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:44,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59340451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:44,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:44,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:44,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065042174] [2022-03-15 15:47:44,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:44,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:44,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:44,506 INFO L87 Difference]: Start difference. First operand 134 states and 314 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:45,035 INFO L93 Difference]: Finished difference Result 195 states and 421 transitions. [2022-03-15 15:47:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:47:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:45,036 INFO L225 Difference]: With dead ends: 195 [2022-03-15 15:47:45,036 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:47:45,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:47:45,037 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:45,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 236 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 633 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-03-15 15:47:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:47:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 129. [2022-03-15 15:47:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.359375) internal successors, (302), 128 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2022-03-15 15:47:45,039 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 16 [2022-03-15 15:47:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:45,039 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2022-03-15 15:47:45,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2022-03-15 15:47:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:45,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:45,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:45,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 15:47:45,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:45,245 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:45,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash -930906004, now seen corresponding path program 78 times [2022-03-15 15:47:45,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:45,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115438296] [2022-03-15 15:47:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:45,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:45,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115438296] [2022-03-15 15:47:45,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115438296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:45,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990342320] [2022-03-15 15:47:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:45,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:45,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:45,401 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:45,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 15:47:45,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:47:45,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:45,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:45,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:45,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:45,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:45,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:46,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:46,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:46,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:46,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:46,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990342320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:46,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:46,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:46,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567522377] [2022-03-15 15:47:46,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:46,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:46,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:46,188 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:46,579 INFO L93 Difference]: Finished difference Result 194 states and 421 transitions. [2022-03-15 15:47:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:47:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:46,580 INFO L225 Difference]: With dead ends: 194 [2022-03-15 15:47:46,580 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 15:47:46,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:47:46,580 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:46,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:47:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 15:47:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2022-03-15 15:47:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.354330708661417) internal successors, (299), 127 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2022-03-15 15:47:46,582 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 16 [2022-03-15 15:47:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:46,583 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2022-03-15 15:47:46,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2022-03-15 15:47:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:46,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:46,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:46,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:46,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:46,798 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash -888893588, now seen corresponding path program 79 times [2022-03-15 15:47:46,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:46,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594501593] [2022-03-15 15:47:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:46,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:46,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594501593] [2022-03-15 15:47:46,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594501593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:46,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939661172] [2022-03-15 15:47:46,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:46,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:46,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:46,918 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:46,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 15:47:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:47,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:47,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:47,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:47,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:47,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:47,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:47,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:47:47,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:47,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:47:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:47,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939661172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:47,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:47,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:47,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602112261] [2022-03-15 15:47:47,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:47,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:47,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:47,551 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:47,849 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2022-03-15 15:47:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:47:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:47,850 INFO L225 Difference]: With dead ends: 181 [2022-03-15 15:47:47,850 INFO L226 Difference]: Without dead ends: 167 [2022-03-15 15:47:47,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:47:47,850 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:47,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 133 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 426 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-03-15 15:47:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-15 15:47:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2022-03-15 15:47:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.354330708661417) internal successors, (299), 127 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2022-03-15 15:47:47,852 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 16 [2022-03-15 15:47:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:47,852 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2022-03-15 15:47:47,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2022-03-15 15:47:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:47,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:47,853 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:47,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 15:47:48,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-15 15:47:48,054 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1756343236, now seen corresponding path program 80 times [2022-03-15 15:47:48,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:48,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508134330] [2022-03-15 15:47:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:47:48,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:48,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508134330] [2022-03-15 15:47:48,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508134330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:48,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955673341] [2022-03-15 15:47:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:48,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:48,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:48,131 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:48,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 15:47:48,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:48,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:47:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:48,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:48,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:47:48,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:48,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:47:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:47:48,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:48,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:48,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:47:48,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:48,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:47:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:47:48,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955673341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:48,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:48,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:47:48,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553438353] [2022-03-15 15:47:48,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:48,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:47:48,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:47:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:48,388 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:48,453 INFO L93 Difference]: Finished difference Result 137 states and 315 transitions. [2022-03-15 15:47:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:47:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:48,454 INFO L225 Difference]: With dead ends: 137 [2022-03-15 15:47:48,454 INFO L226 Difference]: Without dead ends: 137 [2022-03-15 15:47:48,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:47:48,455 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:48,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:47:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-15 15:47:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2022-03-15 15:47:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3464566929133857) internal successors, (298), 127 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 298 transitions. [2022-03-15 15:47:48,457 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 298 transitions. Word has length 16 [2022-03-15 15:47:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 298 transitions. [2022-03-15 15:47:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 298 transitions. [2022-03-15 15:47:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:48,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:48,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:48,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 15:47:48,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-15 15:47:48,658 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash 76300736, now seen corresponding path program 81 times [2022-03-15 15:47:48,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:48,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37336785] [2022-03-15 15:47:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:48,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:48,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37336785] [2022-03-15 15:47:48,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37336785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:48,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950941248] [2022-03-15 15:47:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:48,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:48,853 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:48,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 15:47:48,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:47:48,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:49,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:49,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:49,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:49,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:49,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:49,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:49,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2022-03-15 15:47:49,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:49,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 51 [2022-03-15 15:47:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:49,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950941248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:49,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:49,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:47:49,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583450055] [2022-03-15 15:47:49,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:49,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:47:49,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:47:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:49,533 INFO L87 Difference]: Start difference. First operand 128 states and 298 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:49,917 INFO L93 Difference]: Finished difference Result 185 states and 396 transitions. [2022-03-15 15:47:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:47:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:49,918 INFO L225 Difference]: With dead ends: 185 [2022-03-15 15:47:49,918 INFO L226 Difference]: Without dead ends: 167 [2022-03-15 15:47:49,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:47:49,918 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:49,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 168 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 505 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-15 15:47:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-15 15:47:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2022-03-15 15:47:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.366412213740458) internal successors, (310), 131 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 310 transitions. [2022-03-15 15:47:49,920 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 310 transitions. Word has length 16 [2022-03-15 15:47:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:49,921 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 310 transitions. [2022-03-15 15:47:49,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 310 transitions. [2022-03-15 15:47:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:49,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:49,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:49,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:50,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-15 15:47:50,122 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1856087496, now seen corresponding path program 82 times [2022-03-15 15:47:50,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:50,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039369775] [2022-03-15 15:47:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:50,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:50,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:50,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039369775] [2022-03-15 15:47:50,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039369775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:50,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658268829] [2022-03-15 15:47:50,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:50,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:50,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:50,269 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:50,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 15:47:50,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:50,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:50,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:47:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:50,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:47:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:50,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:50,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:50,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 82 [2022-03-15 15:47:50,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:50,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2022-03-15 15:47:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:50,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658268829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:50,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:50,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:50,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531583549] [2022-03-15 15:47:50,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:50,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:50,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:50,802 INFO L87 Difference]: Start difference. First operand 132 states and 310 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:51,153 INFO L93 Difference]: Finished difference Result 200 states and 434 transitions. [2022-03-15 15:47:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:47:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:51,154 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:47:51,154 INFO L226 Difference]: Without dead ends: 180 [2022-03-15 15:47:51,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:47:51,154 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:51,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 251 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 621 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-15 15:47:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-15 15:47:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 142. [2022-03-15 15:47:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3900709219858154) internal successors, (337), 141 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 337 transitions. [2022-03-15 15:47:51,157 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 337 transitions. Word has length 16 [2022-03-15 15:47:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:51,157 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 337 transitions. [2022-03-15 15:47:51,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 337 transitions. [2022-03-15 15:47:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:51,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:51,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:51,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:51,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 15:47:51,371 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:51,371 INFO L85 PathProgramCache]: Analyzing trace with hash 371478892, now seen corresponding path program 83 times [2022-03-15 15:47:51,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:51,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698396521] [2022-03-15 15:47:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:51,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:51,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698396521] [2022-03-15 15:47:51,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698396521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:51,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295450923] [2022-03-15 15:47:51,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:47:51,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:51,541 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:51,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 15:47:51,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:47:51,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:51,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:51,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:51,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:51,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:51,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:52,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:52,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:47:52,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:52,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:47:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:52,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295450923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:52,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:52,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:52,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929129266] [2022-03-15 15:47:52,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:52,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:52,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:52,273 INFO L87 Difference]: Start difference. First operand 142 states and 337 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:52,891 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2022-03-15 15:47:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:47:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:52,892 INFO L225 Difference]: With dead ends: 228 [2022-03-15 15:47:52,892 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 15:47:52,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:47:52,893 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:52,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 230 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:47:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 15:47:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 143. [2022-03-15 15:47:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.3943661971830985) internal successors, (340), 142 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 340 transitions. [2022-03-15 15:47:52,895 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 340 transitions. Word has length 16 [2022-03-15 15:47:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 340 transitions. [2022-03-15 15:47:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 340 transitions. [2022-03-15 15:47:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:52,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:52,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:52,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 15:47:53,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:53,111 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1774691868, now seen corresponding path program 84 times [2022-03-15 15:47:53,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:53,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470508833] [2022-03-15 15:47:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:53,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:53,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470508833] [2022-03-15 15:47:53,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470508833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:53,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425068073] [2022-03-15 15:47:53,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:47:53,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:53,272 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 15:47:53,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:47:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:53,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:53,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:53,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:53,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:53,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:53,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:47:53,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:53,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:47:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:53,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425068073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:53,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:53,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:47:53,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398168531] [2022-03-15 15:47:53,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:53,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:47:53,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:53,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:47:53,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:53,806 INFO L87 Difference]: Start difference. First operand 143 states and 340 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:54,337 INFO L93 Difference]: Finished difference Result 236 states and 500 transitions. [2022-03-15 15:47:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:47:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:54,338 INFO L225 Difference]: With dead ends: 236 [2022-03-15 15:47:54,338 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 15:47:54,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:47:54,339 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 143 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 420 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-03-15 15:47:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 15:47:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2022-03-15 15:47:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.3943661971830985) internal successors, (340), 142 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 340 transitions. [2022-03-15 15:47:54,355 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 340 transitions. Word has length 16 [2022-03-15 15:47:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:54,355 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 340 transitions. [2022-03-15 15:47:54,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 340 transitions. [2022-03-15 15:47:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:54,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:54,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:54,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 15:47:54,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:54,557 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -809497544, now seen corresponding path program 85 times [2022-03-15 15:47:54,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:54,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150377468] [2022-03-15 15:47:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:54,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:54,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150377468] [2022-03-15 15:47:54,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150377468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:54,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089623722] [2022-03-15 15:47:54,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:47:54,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:54,708 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:54,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 15:47:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:54,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:47:54,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:54,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:47:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:55,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:55,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 118 [2022-03-15 15:47:55,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:55,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 90 [2022-03-15 15:47:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:55,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089623722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:55,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:55,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:55,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713916705] [2022-03-15 15:47:55,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:55,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:55,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:55,416 INFO L87 Difference]: Start difference. First operand 143 states and 340 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:55,642 INFO L93 Difference]: Finished difference Result 187 states and 416 transitions. [2022-03-15 15:47:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:47:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:55,643 INFO L225 Difference]: With dead ends: 187 [2022-03-15 15:47:55,643 INFO L226 Difference]: Without dead ends: 173 [2022-03-15 15:47:55,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:47:55,643 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:55,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 128 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-03-15 15:47:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-15 15:47:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2022-03-15 15:47:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4055944055944054) internal successors, (344), 143 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 344 transitions. [2022-03-15 15:47:55,646 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 344 transitions. Word has length 16 [2022-03-15 15:47:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:55,646 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 344 transitions. [2022-03-15 15:47:55,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 344 transitions. [2022-03-15 15:47:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:55,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:55,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:55,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:55,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:55,859 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash 413491308, now seen corresponding path program 86 times [2022-03-15 15:47:55,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:55,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811180562] [2022-03-15 15:47:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:56,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:56,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811180562] [2022-03-15 15:47:56,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811180562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:56,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126146377] [2022-03-15 15:47:56,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:47:56,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:56,054 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:56,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 15:47:56,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:47:56,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:56,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:56,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:56,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:47:56,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:56,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:47:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:56,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:56,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:56,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:47:56,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:56,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:47:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:56,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126146377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:56,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:56,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:47:56,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771719328] [2022-03-15 15:47:56,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:56,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:47:56,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:47:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:47:56,914 INFO L87 Difference]: Start difference. First operand 144 states and 344 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:57,332 INFO L93 Difference]: Finished difference Result 198 states and 444 transitions. [2022-03-15 15:47:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:47:57,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:57,333 INFO L225 Difference]: With dead ends: 198 [2022-03-15 15:47:57,333 INFO L226 Difference]: Without dead ends: 184 [2022-03-15 15:47:57,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:47:57,334 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:57,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 154 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 467 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-03-15 15:47:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-15 15:47:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 146. [2022-03-15 15:47:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.413793103448276) internal successors, (350), 145 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 350 transitions. [2022-03-15 15:47:57,336 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 350 transitions. Word has length 16 [2022-03-15 15:47:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 350 transitions. [2022-03-15 15:47:57,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 350 transitions. [2022-03-15 15:47:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:57,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:57,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:57,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 15:47:57,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:57,543 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1378685632, now seen corresponding path program 87 times [2022-03-15 15:47:57,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:57,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230565949] [2022-03-15 15:47:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:57,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:57,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230565949] [2022-03-15 15:47:57,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230565949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:57,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011775333] [2022-03-15 15:47:57,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:47:57,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:57,716 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:57,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 15:47:57,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:47:57,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:57,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:57,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:47:57,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:57,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:47:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:57,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:58,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:58,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:47:58,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:58,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:47:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:58,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011775333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:58,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:58,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:58,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135816858] [2022-03-15 15:47:58,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:58,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:58,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:58,487 INFO L87 Difference]: Start difference. First operand 146 states and 350 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:47:58,808 INFO L93 Difference]: Finished difference Result 206 states and 447 transitions. [2022-03-15 15:47:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:47:58,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:47:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:47:58,809 INFO L225 Difference]: With dead ends: 206 [2022-03-15 15:47:58,809 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:47:58,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:47:58,809 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:47:58,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 211 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 500 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-03-15 15:47:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:47:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2022-03-15 15:47:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.413793103448276) internal successors, (350), 145 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 350 transitions. [2022-03-15 15:47:58,811 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 350 transitions. Word has length 16 [2022-03-15 15:47:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:47:58,811 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 350 transitions. [2022-03-15 15:47:58,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:47:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 350 transitions. [2022-03-15 15:47:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:47:58,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:47:58,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:47:58,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 15:47:59,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:59,020 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:47:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:47:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash 843455830, now seen corresponding path program 88 times [2022-03-15 15:47:59,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:47:59,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355274499] [2022-03-15 15:47:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:47:59,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:47:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:47:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:59,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:47:59,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355274499] [2022-03-15 15:47:59,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355274499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:47:59,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505816661] [2022-03-15 15:47:59,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:47:59,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:47:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:47:59,174 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:47:59,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 15:47:59,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:47:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:47:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:47:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:47:59,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:59,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:47:59,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:47:59,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:47:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:59,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:47:59,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:59,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:47:59,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:47:59,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:47:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:47:59,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505816661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:47:59,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:47:59,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:47:59,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193984710] [2022-03-15 15:47:59,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:47:59,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:47:59,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:47:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:47:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:47:59,970 INFO L87 Difference]: Start difference. First operand 146 states and 350 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:00,339 INFO L93 Difference]: Finished difference Result 198 states and 439 transitions. [2022-03-15 15:48:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:48:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:00,340 INFO L225 Difference]: With dead ends: 198 [2022-03-15 15:48:00,340 INFO L226 Difference]: Without dead ends: 184 [2022-03-15 15:48:00,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:48:00,340 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:00,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 185 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 373 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-03-15 15:48:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-15 15:48:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 148. [2022-03-15 15:48:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.401360544217687) internal successors, (353), 147 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 353 transitions. [2022-03-15 15:48:00,342 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 353 transitions. Word has length 16 [2022-03-15 15:48:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:00,342 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 353 transitions. [2022-03-15 15:48:00,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 353 transitions. [2022-03-15 15:48:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:00,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:00,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:00,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 15:48:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-15 15:48:00,555 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 326451170, now seen corresponding path program 89 times [2022-03-15 15:48:00,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:00,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976477996] [2022-03-15 15:48:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:00,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:00,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:00,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976477996] [2022-03-15 15:48:00,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976477996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:00,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36077754] [2022-03-15 15:48:00,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:00,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:00,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:00,654 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:00,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 15:48:00,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:00,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:00,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:48:00,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:00,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 15:48:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:00,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:01,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:01,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:48:01,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:01,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:48:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:01,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36077754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:01,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:01,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:01,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550253970] [2022-03-15 15:48:01,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:01,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:01,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:01,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:01,124 INFO L87 Difference]: Start difference. First operand 148 states and 353 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:01,522 INFO L93 Difference]: Finished difference Result 229 states and 502 transitions. [2022-03-15 15:48:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:48:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:01,523 INFO L225 Difference]: With dead ends: 229 [2022-03-15 15:48:01,523 INFO L226 Difference]: Without dead ends: 223 [2022-03-15 15:48:01,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:48:01,523 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:01,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 180 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 524 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-03-15 15:48:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-15 15:48:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2022-03-15 15:48:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.432258064516129) internal successors, (377), 155 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 377 transitions. [2022-03-15 15:48:01,526 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 377 transitions. Word has length 16 [2022-03-15 15:48:01,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:01,526 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 377 transitions. [2022-03-15 15:48:01,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 377 transitions. [2022-03-15 15:48:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:01,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:01,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:01,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 15:48:01,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-03-15 15:48:01,728 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1390703244, now seen corresponding path program 90 times [2022-03-15 15:48:01,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:01,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023102703] [2022-03-15 15:48:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:01,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:01,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:01,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023102703] [2022-03-15 15:48:01,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023102703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:01,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127885446] [2022-03-15 15:48:01,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:01,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:01,866 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:01,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 15:48:01,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:01,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:01,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:01,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:01,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:48:01,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:01,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:48:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:01,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:02,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:02,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-03-15 15:48:02,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:02,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-15 15:48:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:02,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127885446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:02,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:02,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:02,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367055551] [2022-03-15 15:48:02,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:02,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:02,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:02,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:02,295 INFO L87 Difference]: Start difference. First operand 156 states and 377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:02,690 INFO L93 Difference]: Finished difference Result 229 states and 497 transitions. [2022-03-15 15:48:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:48:02,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:02,691 INFO L225 Difference]: With dead ends: 229 [2022-03-15 15:48:02,691 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 15:48:02,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:48:02,692 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:02,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 287 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 822 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-03-15 15:48:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 15:48:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 146. [2022-03-15 15:48:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.4) internal successors, (348), 145 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 348 transitions. [2022-03-15 15:48:02,700 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 348 transitions. Word has length 16 [2022-03-15 15:48:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:02,700 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 348 transitions. [2022-03-15 15:48:02,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 348 transitions. [2022-03-15 15:48:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:02,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:02,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:02,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:02,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:02,916 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1740949738, now seen corresponding path program 91 times [2022-03-15 15:48:02,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:02,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372826559] [2022-03-15 15:48:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:03,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:03,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372826559] [2022-03-15 15:48:03,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372826559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:03,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350791631] [2022-03-15 15:48:03,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:03,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:03,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:03,040 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:03,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 15:48:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:03,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:03,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:03,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:03,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:03,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:03,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:03,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 78 [2022-03-15 15:48:03,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:03,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 58 [2022-03-15 15:48:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:03,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350791631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:03,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:03,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:03,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816611090] [2022-03-15 15:48:03,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:03,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:03,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:03,550 INFO L87 Difference]: Start difference. First operand 146 states and 348 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:03,914 INFO L93 Difference]: Finished difference Result 235 states and 503 transitions. [2022-03-15 15:48:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:03,915 INFO L225 Difference]: With dead ends: 235 [2022-03-15 15:48:03,915 INFO L226 Difference]: Without dead ends: 221 [2022-03-15 15:48:03,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:48:03,916 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:03,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-15 15:48:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 145. [2022-03-15 15:48:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.4027777777777777) internal successors, (346), 144 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 346 transitions. [2022-03-15 15:48:03,920 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 346 transitions. Word has length 16 [2022-03-15 15:48:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:03,921 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 346 transitions. [2022-03-15 15:48:03,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 346 transitions. [2022-03-15 15:48:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:03,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:03,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:03,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 15:48:04,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:04,137 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:04,137 INFO L85 PathProgramCache]: Analyzing trace with hash 407846798, now seen corresponding path program 92 times [2022-03-15 15:48:04,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:04,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654442878] [2022-03-15 15:48:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:04,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:04,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:04,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654442878] [2022-03-15 15:48:04,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654442878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:04,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225232171] [2022-03-15 15:48:04,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:04,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:04,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:04,261 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:04,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 15:48:04,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:04,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:04,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:04,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:04,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:04,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:04,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:48:04,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:04,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:48:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:04,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225232171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:04,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:04,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:04,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101118514] [2022-03-15 15:48:04,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:04,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:04,778 INFO L87 Difference]: Start difference. First operand 145 states and 346 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:05,339 INFO L93 Difference]: Finished difference Result 246 states and 524 transitions. [2022-03-15 15:48:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:48:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:05,340 INFO L225 Difference]: With dead ends: 246 [2022-03-15 15:48:05,340 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:48:05,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:48:05,342 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:05,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 146 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 509 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-03-15 15:48:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:48:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2022-03-15 15:48:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.4) internal successors, (348), 145 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 348 transitions. [2022-03-15 15:48:05,344 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 348 transitions. Word has length 16 [2022-03-15 15:48:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:05,344 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 348 transitions. [2022-03-15 15:48:05,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 348 transitions. [2022-03-15 15:48:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:05,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:05,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:05,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 15:48:05,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:05,561 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1373041122, now seen corresponding path program 93 times [2022-03-15 15:48:05,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:05,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976173099] [2022-03-15 15:48:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:05,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:05,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:05,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976173099] [2022-03-15 15:48:05,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976173099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:05,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632354043] [2022-03-15 15:48:05,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:05,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:05,728 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:05,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 15:48:05,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:48:05,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:05,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:05,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:48:05,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:05,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:48:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:06,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:06,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 118 [2022-03-15 15:48:06,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:06,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 90 [2022-03-15 15:48:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:06,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632354043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:06,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:06,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:06,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402373084] [2022-03-15 15:48:06,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:06,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:06,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:06,299 INFO L87 Difference]: Start difference. First operand 146 states and 348 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:06,653 INFO L93 Difference]: Finished difference Result 191 states and 419 transitions. [2022-03-15 15:48:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:06,654 INFO L225 Difference]: With dead ends: 191 [2022-03-15 15:48:06,654 INFO L226 Difference]: Without dead ends: 177 [2022-03-15 15:48:06,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:48:06,655 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:06,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 116 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 273 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-03-15 15:48:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-15 15:48:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2022-03-15 15:48:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.388888888888889) internal successors, (344), 144 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 344 transitions. [2022-03-15 15:48:06,657 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 344 transitions. Word has length 16 [2022-03-15 15:48:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:06,657 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 344 transitions. [2022-03-15 15:48:06,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 344 transitions. [2022-03-15 15:48:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:06,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:06,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:06,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:06,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:06,867 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1698937322, now seen corresponding path program 94 times [2022-03-15 15:48:06,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:06,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796312779] [2022-03-15 15:48:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:06,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:07,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:07,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796312779] [2022-03-15 15:48:07,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796312779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:07,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990573785] [2022-03-15 15:48:07,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:07,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:07,020 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:07,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 15:48:07,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:07,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:07,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:07,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:07,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:07,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:07,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:48:07,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:07,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:48:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:07,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990573785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:07,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:07,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:07,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410533318] [2022-03-15 15:48:07,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:07,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:07,816 INFO L87 Difference]: Start difference. First operand 145 states and 344 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:07,955 INFO L93 Difference]: Finished difference Result 166 states and 382 transitions. [2022-03-15 15:48:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:07,959 INFO L225 Difference]: With dead ends: 166 [2022-03-15 15:48:07,959 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 15:48:07,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:48:07,960 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:07,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 86 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 320 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-15 15:48:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 15:48:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2022-03-15 15:48:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3972602739726026) internal successors, (350), 146 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 350 transitions. [2022-03-15 15:48:07,965 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 350 transitions. Word has length 16 [2022-03-15 15:48:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:07,965 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 350 transitions. [2022-03-15 15:48:07,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 350 transitions. [2022-03-15 15:48:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:07,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:07,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:07,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 15:48:08,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 15:48:08,181 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash -733742998, now seen corresponding path program 95 times [2022-03-15 15:48:08,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:08,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120210610] [2022-03-15 15:48:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:08,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:08,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120210610] [2022-03-15 15:48:08,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120210610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:08,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239731733] [2022-03-15 15:48:08,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:08,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:08,371 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:08,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 15:48:08,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:08,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:08,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:08,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:48:08,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:08,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:48:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:08,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:09,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:09,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:48:09,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:09,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:48:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:09,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239731733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:09,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:09,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:09,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886751156] [2022-03-15 15:48:09,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:09,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:09,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:09,149 INFO L87 Difference]: Start difference. First operand 147 states and 350 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:09,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:09,279 INFO L93 Difference]: Finished difference Result 165 states and 379 transitions. [2022-03-15 15:48:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:09,280 INFO L225 Difference]: With dead ends: 165 [2022-03-15 15:48:09,280 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 15:48:09,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:09,280 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:09,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-03-15 15:48:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 15:48:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2022-03-15 15:48:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.393103448275862) internal successors, (347), 145 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 347 transitions. [2022-03-15 15:48:09,282 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 347 transitions. Word has length 16 [2022-03-15 15:48:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:09,282 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 347 transitions. [2022-03-15 15:48:09,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 347 transitions. [2022-03-15 15:48:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:09,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:09,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:09,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:09,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 15:48:09,483 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:09,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1268972800, now seen corresponding path program 96 times [2022-03-15 15:48:09,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:09,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546679146] [2022-03-15 15:48:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:09,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:09,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546679146] [2022-03-15 15:48:09,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546679146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:09,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347584621] [2022-03-15 15:48:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:09,626 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:09,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 15:48:09,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:48:09,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:09,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:09,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:09,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:09,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:48:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:09,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:48:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:09,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:10,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:10,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:48:10,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:10,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:48:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:10,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347584621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:10,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:10,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:10,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109437902] [2022-03-15 15:48:10,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:10,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:10,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:10,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:10,308 INFO L87 Difference]: Start difference. First operand 146 states and 347 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:10,449 INFO L93 Difference]: Finished difference Result 167 states and 382 transitions. [2022-03-15 15:48:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:48:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:10,450 INFO L225 Difference]: With dead ends: 167 [2022-03-15 15:48:10,450 INFO L226 Difference]: Without dead ends: 160 [2022-03-15 15:48:10,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:10,450 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:10,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 112 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-03-15 15:48:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-15 15:48:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2022-03-15 15:48:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.388888888888889) internal successors, (344), 144 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 344 transitions. [2022-03-15 15:48:10,452 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 344 transitions. Word has length 16 [2022-03-15 15:48:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:10,452 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 344 transitions. [2022-03-15 15:48:10,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 344 transitions. [2022-03-15 15:48:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:10,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:10,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:10,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:10,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 15:48:10,653 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:10,653 INFO L85 PathProgramCache]: Analyzing trace with hash -658701524, now seen corresponding path program 97 times [2022-03-15 15:48:10,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:10,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567653983] [2022-03-15 15:48:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:10,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:10,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567653983] [2022-03-15 15:48:10,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567653983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:10,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017075913] [2022-03-15 15:48:10,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:10,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:10,787 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:10,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 15:48:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:10,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:10,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:10,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:10,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:11,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:11,577 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:11,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:48:11,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:48:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:11,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017075913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:11,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:11,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:11,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757000324] [2022-03-15 15:48:11,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:11,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:11,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:11,610 INFO L87 Difference]: Start difference. First operand 145 states and 344 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:11,814 INFO L93 Difference]: Finished difference Result 183 states and 433 transitions. [2022-03-15 15:48:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:48:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:11,815 INFO L225 Difference]: With dead ends: 183 [2022-03-15 15:48:11,815 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 15:48:11,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:48:11,815 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:11,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 115 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2022-03-15 15:48:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 15:48:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 148. [2022-03-15 15:48:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.401360544217687) internal successors, (353), 147 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 353 transitions. [2022-03-15 15:48:11,817 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 353 transitions. Word has length 16 [2022-03-15 15:48:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:11,817 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 353 transitions. [2022-03-15 15:48:11,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 353 transitions. [2022-03-15 15:48:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:11,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:11,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:11,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:12,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 15:48:12,034 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash 877947606, now seen corresponding path program 98 times [2022-03-15 15:48:12,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:12,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971673704] [2022-03-15 15:48:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:12,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:12,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971673704] [2022-03-15 15:48:12,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971673704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:12,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323383546] [2022-03-15 15:48:12,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:12,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:12,178 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:12,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 15:48:12,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:12,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:12,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:12,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:12,817 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:12,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:48:12,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:48:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:12,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323383546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:12,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:12,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:12,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909685758] [2022-03-15 15:48:12,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:12,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:12,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:12,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:12,845 INFO L87 Difference]: Start difference. First operand 148 states and 353 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:13,036 INFO L93 Difference]: Finished difference Result 184 states and 430 transitions. [2022-03-15 15:48:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:48:13,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:13,036 INFO L225 Difference]: With dead ends: 184 [2022-03-15 15:48:13,036 INFO L226 Difference]: Without dead ends: 174 [2022-03-15 15:48:13,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:13,037 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:13,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 368 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:48:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-15 15:48:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2022-03-15 15:48:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.401360544217687) internal successors, (353), 147 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 353 transitions. [2022-03-15 15:48:13,040 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 353 transitions. Word has length 16 [2022-03-15 15:48:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:13,040 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 353 transitions. [2022-03-15 15:48:13,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 353 transitions. [2022-03-15 15:48:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:13,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:13,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:13,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:13,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 15:48:13,260 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:13,260 INFO L85 PathProgramCache]: Analyzing trace with hash 306492800, now seen corresponding path program 99 times [2022-03-15 15:48:13,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:13,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325482479] [2022-03-15 15:48:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:13,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:13,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:13,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325482479] [2022-03-15 15:48:13,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325482479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:13,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667654757] [2022-03-15 15:48:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:13,400 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:13,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 15:48:13,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:48:13,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:13,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:13,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:48:13,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:13,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:13,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:13,908 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:13,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:48:13,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:48:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:13,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667654757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:13,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:13,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:13,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195813026] [2022-03-15 15:48:13,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:13,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:13,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:13,945 INFO L87 Difference]: Start difference. First operand 148 states and 353 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:14,063 INFO L93 Difference]: Finished difference Result 182 states and 427 transitions. [2022-03-15 15:48:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:48:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:14,064 INFO L225 Difference]: With dead ends: 182 [2022-03-15 15:48:14,064 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:48:14,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:48:14,064 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:14,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 132 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-03-15 15:48:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:48:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2022-03-15 15:48:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3972602739726026) internal successors, (350), 146 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 350 transitions. [2022-03-15 15:48:14,066 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 350 transitions. Word has length 16 [2022-03-15 15:48:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:14,067 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 350 transitions. [2022-03-15 15:48:14,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 350 transitions. [2022-03-15 15:48:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:14,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:14,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:14,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:14,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:14,283 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash -228737002, now seen corresponding path program 100 times [2022-03-15 15:48:14,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:14,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148931512] [2022-03-15 15:48:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:14,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:14,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148931512] [2022-03-15 15:48:14,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148931512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:14,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871315566] [2022-03-15 15:48:14,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:14,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:14,468 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 15:48:14,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:14,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:14,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:14,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:48:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:14,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:48:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:14,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:15,056 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:15,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:48:15,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:48:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:15,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871315566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:15,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:15,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:15,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048373666] [2022-03-15 15:48:15,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:15,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:15,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:15,080 INFO L87 Difference]: Start difference. First operand 147 states and 350 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:15,172 INFO L93 Difference]: Finished difference Result 181 states and 421 transitions. [2022-03-15 15:48:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:48:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:15,172 INFO L225 Difference]: With dead ends: 181 [2022-03-15 15:48:15,172 INFO L226 Difference]: Without dead ends: 174 [2022-03-15 15:48:15,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:15,173 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:15,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 140 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:48:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-15 15:48:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2022-03-15 15:48:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.393103448275862) internal successors, (347), 145 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 347 transitions. [2022-03-15 15:48:15,176 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 347 transitions. Word has length 16 [2022-03-15 15:48:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:15,176 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 347 transitions. [2022-03-15 15:48:15,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 347 transitions. [2022-03-15 15:48:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:15,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:15,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:15,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:15,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:15,392 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1241429534, now seen corresponding path program 101 times [2022-03-15 15:48:15,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:15,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227417701] [2022-03-15 15:48:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:15,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:15,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227417701] [2022-03-15 15:48:15,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227417701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:15,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166838253] [2022-03-15 15:48:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:15,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:15,518 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:15,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 15:48:15,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:15,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:15,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:15,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:15,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:48:15,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:15,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:15,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:16,150 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:16,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:48:16,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:48:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:16,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166838253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:16,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:16,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:16,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932126605] [2022-03-15 15:48:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:16,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:16,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:16,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:16,193 INFO L87 Difference]: Start difference. First operand 146 states and 347 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:16,405 INFO L93 Difference]: Finished difference Result 198 states and 452 transitions. [2022-03-15 15:48:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:48:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:16,406 INFO L225 Difference]: With dead ends: 198 [2022-03-15 15:48:16,406 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 15:48:16,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:48:16,406 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:16,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 149 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 0 Unknown, 202 Unchecked, 0.1s Time] [2022-03-15 15:48:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 15:48:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 148. [2022-03-15 15:48:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.380952380952381) internal successors, (350), 147 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 350 transitions. [2022-03-15 15:48:16,408 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 350 transitions. Word has length 16 [2022-03-15 15:48:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:16,408 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 350 transitions. [2022-03-15 15:48:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 350 transitions. [2022-03-15 15:48:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:16,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:16,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:16,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:16,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 15:48:16,625 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash 111393628, now seen corresponding path program 102 times [2022-03-15 15:48:16,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:16,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255253365] [2022-03-15 15:48:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:16,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:16,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:16,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255253365] [2022-03-15 15:48:16,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255253365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:16,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16887852] [2022-03-15 15:48:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:16,783 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 15:48:16,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:48:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:16,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-15 15:48:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:17,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:17,444 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:17,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:48:17,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:48:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:17,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16887852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:17,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:17,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:48:17,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475677330] [2022-03-15 15:48:17,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:17,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:17,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:17,487 INFO L87 Difference]: Start difference. First operand 148 states and 350 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:17,711 INFO L93 Difference]: Finished difference Result 209 states and 467 transitions. [2022-03-15 15:48:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:48:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:17,712 INFO L225 Difference]: With dead ends: 209 [2022-03-15 15:48:17,712 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:48:17,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:17,712 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:17,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 153 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 425 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-15 15:48:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:48:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 148. [2022-03-15 15:48:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.380952380952381) internal successors, (350), 147 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 350 transitions. [2022-03-15 15:48:17,714 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 350 transitions. Word has length 16 [2022-03-15 15:48:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:17,715 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 350 transitions. [2022-03-15 15:48:17,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 350 transitions. [2022-03-15 15:48:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:17,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:17,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:17,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 15:48:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 15:48:17,916 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1478541122, now seen corresponding path program 103 times [2022-03-15 15:48:17,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:17,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930467014] [2022-03-15 15:48:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:18,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:18,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930467014] [2022-03-15 15:48:18,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930467014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:18,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146539078] [2022-03-15 15:48:18,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:18,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:18,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:18,099 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:18,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 15:48:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:18,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:18,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:18,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:18,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:18,579 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:18,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2022-03-15 15:48:18,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-03-15 15:48:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:18,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146539078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:18,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:18,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:18,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216418440] [2022-03-15 15:48:18,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:18,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:18,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:18,591 INFO L87 Difference]: Start difference. First operand 148 states and 350 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:18,783 INFO L93 Difference]: Finished difference Result 194 states and 436 transitions. [2022-03-15 15:48:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:18,784 INFO L225 Difference]: With dead ends: 194 [2022-03-15 15:48:18,784 INFO L226 Difference]: Without dead ends: 169 [2022-03-15 15:48:18,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:48:18,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:18,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 129 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2022-03-15 15:48:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-15 15:48:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-03-15 15:48:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.3716216216216215) internal successors, (351), 148 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 351 transitions. [2022-03-15 15:48:18,793 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 351 transitions. Word has length 16 [2022-03-15 15:48:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:18,793 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 351 transitions. [2022-03-15 15:48:18,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 351 transitions. [2022-03-15 15:48:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:18,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:18,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:18,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 15:48:19,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:19,009 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:19,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1143459830, now seen corresponding path program 104 times [2022-03-15 15:48:19,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:19,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173725746] [2022-03-15 15:48:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:19,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:19,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:19,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173725746] [2022-03-15 15:48:19,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173725746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:19,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220685700] [2022-03-15 15:48:19,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:19,157 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:19,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 15:48:19,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:19,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:19,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:19,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:19,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:19,805 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:19,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:19,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-03-15 15:48:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:19,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220685700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:19,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:19,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:48:19,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885744947] [2022-03-15 15:48:19,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:19,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:48:19,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:48:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:48:19,820 INFO L87 Difference]: Start difference. First operand 149 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:20,062 INFO L93 Difference]: Finished difference Result 183 states and 419 transitions. [2022-03-15 15:48:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:48:20,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:20,063 INFO L225 Difference]: With dead ends: 183 [2022-03-15 15:48:20,063 INFO L226 Difference]: Without dead ends: 170 [2022-03-15 15:48:20,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:48:20,063 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:20,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-03-15 15:48:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-15 15:48:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2022-03-15 15:48:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3698630136986303) internal successors, (346), 146 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 346 transitions. [2022-03-15 15:48:20,065 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 346 transitions. Word has length 16 [2022-03-15 15:48:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:20,065 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 346 transitions. [2022-03-15 15:48:20,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 346 transitions. [2022-03-15 15:48:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:48:20,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:20,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:20,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:20,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:20,266 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:20,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1084106558, now seen corresponding path program 105 times [2022-03-15 15:48:20,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:20,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975571002] [2022-03-15 15:48:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:20,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:20,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975571002] [2022-03-15 15:48:20,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975571002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:20,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498130561] [2022-03-15 15:48:20,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:20,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:20,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:20,467 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:20,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 15:48:20,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:48:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:48:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:20,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:48:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:20,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:48:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:20,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:21,301 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:21,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2022-03-15 15:48:21,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-03-15 15:48:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:21,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498130561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:21,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:21,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:48:21,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126264570] [2022-03-15 15:48:21,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:48:21,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:48:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:21,337 INFO L87 Difference]: Start difference. First operand 147 states and 346 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:21,457 INFO L93 Difference]: Finished difference Result 183 states and 423 transitions. [2022-03-15 15:48:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:48:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:21,457 INFO L225 Difference]: With dead ends: 183 [2022-03-15 15:48:21,457 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 15:48:21,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:21,458 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:21,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 138 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 299 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-15 15:48:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 15:48:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2022-03-15 15:48:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.375) internal successors, (342), 144 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 342 transitions. [2022-03-15 15:48:21,460 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 342 transitions. Word has length 16 [2022-03-15 15:48:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:21,460 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 342 transitions. [2022-03-15 15:48:21,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 342 transitions. [2022-03-15 15:48:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:21,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:21,460 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:21,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:21,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-15 15:48:21,661 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:21,661 INFO L85 PathProgramCache]: Analyzing trace with hash -644328221, now seen corresponding path program 106 times [2022-03-15 15:48:21,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:21,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698322227] [2022-03-15 15:48:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:21,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:21,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:21,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698322227] [2022-03-15 15:48:21,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698322227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:21,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276892452] [2022-03-15 15:48:21,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:21,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:21,746 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:21,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 15:48:21,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:21,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:21,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:48:21,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:48:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:21,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:21,957 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:21,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:21,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276892452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:21,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:21,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:48:21,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451032569] [2022-03-15 15:48:21,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:21,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:48:21,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:21,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:48:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:48:21,966 INFO L87 Difference]: Start difference. First operand 145 states and 342 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:22,036 INFO L93 Difference]: Finished difference Result 205 states and 474 transitions. [2022-03-15 15:48:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:22,037 INFO L225 Difference]: With dead ends: 205 [2022-03-15 15:48:22,037 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 15:48:22,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:48:22,037 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:22,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:48:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 15:48:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2022-03-15 15:48:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.3815789473684212) internal successors, (362), 152 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 362 transitions. [2022-03-15 15:48:22,039 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 362 transitions. Word has length 17 [2022-03-15 15:48:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:22,039 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 362 transitions. [2022-03-15 15:48:22,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 362 transitions. [2022-03-15 15:48:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:22,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:22,040 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:22,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 15:48:22,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 15:48:22,240 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1987986387, now seen corresponding path program 107 times [2022-03-15 15:48:22,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:22,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752290014] [2022-03-15 15:48:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:22,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:22,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:22,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752290014] [2022-03-15 15:48:22,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752290014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:22,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492287918] [2022-03-15 15:48:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:22,319 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:22,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 15:48:22,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:22,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:22,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:48:22,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:48:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:22,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:22,526 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:22,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:22,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492287918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:22,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:22,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:48:22,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519773351] [2022-03-15 15:48:22,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:22,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:48:22,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:22,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:48:22,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:48:22,533 INFO L87 Difference]: Start difference. First operand 153 states and 362 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:22,617 INFO L93 Difference]: Finished difference Result 224 states and 508 transitions. [2022-03-15 15:48:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:22,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:22,618 INFO L225 Difference]: With dead ends: 224 [2022-03-15 15:48:22,618 INFO L226 Difference]: Without dead ends: 224 [2022-03-15 15:48:22,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:48:22,618 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:22,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 98 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-15 15:48:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-15 15:48:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 147. [2022-03-15 15:48:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.404109589041096) internal successors, (351), 146 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 351 transitions. [2022-03-15 15:48:22,620 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 351 transitions. Word has length 17 [2022-03-15 15:48:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:22,620 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 351 transitions. [2022-03-15 15:48:22,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 351 transitions. [2022-03-15 15:48:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:22,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:22,621 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:22,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:22,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 15:48:22,821 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 398051637, now seen corresponding path program 108 times [2022-03-15 15:48:22,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:22,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734530127] [2022-03-15 15:48:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:22,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:22,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:22,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734530127] [2022-03-15 15:48:22,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734530127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:22,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110976655] [2022-03-15 15:48:22,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:22,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:22,874 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:22,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 15:48:22,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:22,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:22,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:48:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:22,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:48:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:23,074 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:23,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:23,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110976655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:23,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:23,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:48:23,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309739649] [2022-03-15 15:48:23,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:23,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:48:23,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:48:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:23,082 INFO L87 Difference]: Start difference. First operand 147 states and 351 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:23,208 INFO L93 Difference]: Finished difference Result 204 states and 455 transitions. [2022-03-15 15:48:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:23,209 INFO L225 Difference]: With dead ends: 204 [2022-03-15 15:48:23,209 INFO L226 Difference]: Without dead ends: 204 [2022-03-15 15:48:23,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:23,209 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:23,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 123 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-03-15 15:48:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-15 15:48:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 141. [2022-03-15 15:48:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.407142857142857) internal successors, (337), 140 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 337 transitions. [2022-03-15 15:48:23,211 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 337 transitions. Word has length 17 [2022-03-15 15:48:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:23,211 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 337 transitions. [2022-03-15 15:48:23,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 337 transitions. [2022-03-15 15:48:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:23,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:23,212 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:23,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 15:48:23,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:23,412 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -763274255, now seen corresponding path program 109 times [2022-03-15 15:48:23,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:23,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946835865] [2022-03-15 15:48:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:23,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:23,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:23,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946835865] [2022-03-15 15:48:23,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946835865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:23,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377771859] [2022-03-15 15:48:23,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:23,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:23,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:23,539 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:23,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 15:48:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:23,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:23,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:48:23,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:23,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:48:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:23,819 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:23,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:48:23,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:48:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:23,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377771859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:23,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:23,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:23,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025869678] [2022-03-15 15:48:23,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:23,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:23,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:23,842 INFO L87 Difference]: Start difference. First operand 141 states and 337 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:23,978 INFO L93 Difference]: Finished difference Result 202 states and 454 transitions. [2022-03-15 15:48:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:48:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:23,979 INFO L225 Difference]: With dead ends: 202 [2022-03-15 15:48:23,979 INFO L226 Difference]: Without dead ends: 180 [2022-03-15 15:48:23,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:23,979 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:23,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 114 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-15 15:48:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-15 15:48:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 132. [2022-03-15 15:48:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.4427480916030535) internal successors, (320), 131 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 320 transitions. [2022-03-15 15:48:23,981 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 320 transitions. Word has length 17 [2022-03-15 15:48:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:23,981 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 320 transitions. [2022-03-15 15:48:23,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 320 transitions. [2022-03-15 15:48:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:23,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:23,981 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:24,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:24,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 15:48:24,182 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1881186575, now seen corresponding path program 110 times [2022-03-15 15:48:24,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:24,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581199520] [2022-03-15 15:48:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:24,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:24,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581199520] [2022-03-15 15:48:24,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581199520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:24,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153415033] [2022-03-15 15:48:24,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:24,261 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:24,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 15:48:24,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:24,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:24,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:24,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:24,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:24,541 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:24,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:24,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153415033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:24,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:24,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:24,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732922513] [2022-03-15 15:48:24,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:24,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:24,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:24,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:24,550 INFO L87 Difference]: Start difference. First operand 132 states and 320 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:24,623 INFO L93 Difference]: Finished difference Result 171 states and 404 transitions. [2022-03-15 15:48:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:24,624 INFO L225 Difference]: With dead ends: 171 [2022-03-15 15:48:24,624 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 15:48:24,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:24,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:24,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 110 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-15 15:48:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 15:48:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 140. [2022-03-15 15:48:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.431654676258993) internal successors, (338), 139 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 338 transitions. [2022-03-15 15:48:24,626 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 338 transitions. Word has length 17 [2022-03-15 15:48:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:24,626 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 338 transitions. [2022-03-15 15:48:24,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 338 transitions. [2022-03-15 15:48:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:24,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:24,626 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:24,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:24,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-15 15:48:24,827 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:24,827 INFO L85 PathProgramCache]: Analyzing trace with hash 189007293, now seen corresponding path program 111 times [2022-03-15 15:48:24,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:24,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100675665] [2022-03-15 15:48:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:24,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:24,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:24,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100675665] [2022-03-15 15:48:24,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100675665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:24,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547155779] [2022-03-15 15:48:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:24,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:24,893 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:24,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 15:48:24,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:48:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:25,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:25,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:25,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:25,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:25,153 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:25,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:25,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547155779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:25,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:25,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:25,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936724356] [2022-03-15 15:48:25,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:25,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:25,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:25,161 INFO L87 Difference]: Start difference. First operand 140 states and 338 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:25,205 INFO L93 Difference]: Finished difference Result 171 states and 404 transitions. [2022-03-15 15:48:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:25,206 INFO L225 Difference]: With dead ends: 171 [2022-03-15 15:48:25,206 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 15:48:25,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:25,206 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:25,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 90 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 95 Unchecked, 0.0s Time] [2022-03-15 15:48:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 15:48:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2022-03-15 15:48:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.43609022556391) internal successors, (324), 133 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2022-03-15 15:48:25,208 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 17 [2022-03-15 15:48:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:25,208 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2022-03-15 15:48:25,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2022-03-15 15:48:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:25,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:25,208 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:25,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:25,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-15 15:48:25,425 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash 109483747, now seen corresponding path program 112 times [2022-03-15 15:48:25,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:25,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633498474] [2022-03-15 15:48:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:25,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:25,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:25,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633498474] [2022-03-15 15:48:25,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633498474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:25,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974113981] [2022-03-15 15:48:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:25,497 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:25,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 15:48:25,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:25,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:25,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:25,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:25,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:25,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:25,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:25,728 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:25,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:25,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974113981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:25,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:25,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:25,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820232283] [2022-03-15 15:48:25,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:25,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:25,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:25,734 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:25,798 INFO L93 Difference]: Finished difference Result 160 states and 382 transitions. [2022-03-15 15:48:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:25,799 INFO L225 Difference]: With dead ends: 160 [2022-03-15 15:48:25,799 INFO L226 Difference]: Without dead ends: 160 [2022-03-15 15:48:25,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:25,799 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:25,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 75 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-03-15 15:48:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-15 15:48:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 135. [2022-03-15 15:48:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.4328358208955225) internal successors, (326), 134 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 326 transitions. [2022-03-15 15:48:25,801 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 326 transitions. Word has length 17 [2022-03-15 15:48:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:25,801 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 326 transitions. [2022-03-15 15:48:25,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 326 transitions. [2022-03-15 15:48:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:25,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:25,801 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:25,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:26,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-15 15:48:26,002 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 190879375, now seen corresponding path program 113 times [2022-03-15 15:48:26,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:26,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407883093] [2022-03-15 15:48:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:26,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:26,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407883093] [2022-03-15 15:48:26,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407883093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:26,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30625909] [2022-03-15 15:48:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:26,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:26,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:26,072 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:26,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 15:48:26,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:48:26,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:26,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:26,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:26,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:26,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:26,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:26,313 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:26,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:26,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30625909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:26,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:26,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:26,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360779838] [2022-03-15 15:48:26,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:26,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:26,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:26,319 INFO L87 Difference]: Start difference. First operand 135 states and 326 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:26,441 INFO L93 Difference]: Finished difference Result 173 states and 401 transitions. [2022-03-15 15:48:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:26,441 INFO L225 Difference]: With dead ends: 173 [2022-03-15 15:48:26,441 INFO L226 Difference]: Without dead ends: 173 [2022-03-15 15:48:26,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:26,441 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:26,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 122 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 271 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:48:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-15 15:48:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2022-03-15 15:48:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.4444444444444446) internal successors, (330), 135 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 330 transitions. [2022-03-15 15:48:26,443 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 330 transitions. Word has length 17 [2022-03-15 15:48:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:26,443 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 330 transitions. [2022-03-15 15:48:26,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 330 transitions. [2022-03-15 15:48:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:26,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:26,444 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:26,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:26,659 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:26,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash -676570273, now seen corresponding path program 114 times [2022-03-15 15:48:26,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:26,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510580031] [2022-03-15 15:48:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:26,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:26,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:26,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510580031] [2022-03-15 15:48:26,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510580031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:26,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539072860] [2022-03-15 15:48:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:26,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:26,784 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:26,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 15:48:26,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:26,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:26,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:26,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:26,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:26,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:26,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:26,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:27,088 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:27,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:48:27,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:48:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:27,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539072860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:27,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:27,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:27,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344810202] [2022-03-15 15:48:27,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:27,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:27,107 INFO L87 Difference]: Start difference. First operand 136 states and 330 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:27,363 INFO L93 Difference]: Finished difference Result 173 states and 399 transitions. [2022-03-15 15:48:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:27,364 INFO L225 Difference]: With dead ends: 173 [2022-03-15 15:48:27,364 INFO L226 Difference]: Without dead ends: 170 [2022-03-15 15:48:27,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:48:27,364 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:27,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 101 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-15 15:48:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-15 15:48:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2022-03-15 15:48:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.431654676258993) internal successors, (338), 139 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 338 transitions. [2022-03-15 15:48:27,366 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 338 transitions. Word has length 17 [2022-03-15 15:48:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:27,366 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 338 transitions. [2022-03-15 15:48:27,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 338 transitions. [2022-03-15 15:48:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:27,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:27,367 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:27,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:27,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:27,579 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1550996115, now seen corresponding path program 115 times [2022-03-15 15:48:27,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:27,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232339197] [2022-03-15 15:48:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:27,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:27,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:27,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232339197] [2022-03-15 15:48:27,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232339197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:27,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514022018] [2022-03-15 15:48:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:27,698 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:27,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 15:48:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:27,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:27,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:27,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:27,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:27,952 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:27,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:48:27,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:48:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:27,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514022018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:27,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:27,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:27,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275865830] [2022-03-15 15:48:27,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:27,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:27,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:27,967 INFO L87 Difference]: Start difference. First operand 140 states and 338 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:28,177 INFO L93 Difference]: Finished difference Result 187 states and 430 transitions. [2022-03-15 15:48:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:48:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:28,178 INFO L225 Difference]: With dead ends: 187 [2022-03-15 15:48:28,178 INFO L226 Difference]: Without dead ends: 187 [2022-03-15 15:48:28,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:48:28,178 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:28,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 127 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-03-15 15:48:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-15 15:48:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2022-03-15 15:48:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.4452554744525545) internal successors, (335), 137 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 335 transitions. [2022-03-15 15:48:28,180 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 335 transitions. Word has length 17 [2022-03-15 15:48:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:28,180 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 335 transitions. [2022-03-15 15:48:28,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 335 transitions. [2022-03-15 15:48:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:28,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:28,181 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:28,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:28,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:28,397 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1156073699, now seen corresponding path program 116 times [2022-03-15 15:48:28,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:28,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736280339] [2022-03-15 15:48:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:28,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:28,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736280339] [2022-03-15 15:48:28,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736280339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476592271] [2022-03-15 15:48:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:28,478 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:28,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 15:48:28,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:28,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:28,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:28,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:28,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:28,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:28,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:28,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:28,743 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:48:28,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:48:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:28,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476592271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:28,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:28,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:48:28,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612485208] [2022-03-15 15:48:28,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:28,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:48:28,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:48:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:28,752 INFO L87 Difference]: Start difference. First operand 138 states and 335 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:28,837 INFO L93 Difference]: Finished difference Result 161 states and 385 transitions. [2022-03-15 15:48:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:48:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:28,837 INFO L225 Difference]: With dead ends: 161 [2022-03-15 15:48:28,837 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 15:48:28,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:28,838 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:28,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 196 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-03-15 15:48:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 15:48:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 138. [2022-03-15 15:48:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.437956204379562) internal successors, (334), 137 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 334 transitions. [2022-03-15 15:48:28,839 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 334 transitions. Word has length 17 [2022-03-15 15:48:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 334 transitions. [2022-03-15 15:48:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 334 transitions. [2022-03-15 15:48:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:28,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:28,840 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:28,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:29,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:29,056 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 613729397, now seen corresponding path program 117 times [2022-03-15 15:48:29,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:29,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305770920] [2022-03-15 15:48:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:29,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:29,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305770920] [2022-03-15 15:48:29,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305770920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:29,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2923204] [2022-03-15 15:48:29,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:29,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:29,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:29,110 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:29,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 15:48:29,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:48:29,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:29,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:29,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:29,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:29,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:29,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:29,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:29,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:29,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:29,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2923204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:29,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:29,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:29,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127764534] [2022-03-15 15:48:29,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:29,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:29,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:29,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:29,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:29,373 INFO L87 Difference]: Start difference. First operand 138 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:29,408 INFO L93 Difference]: Finished difference Result 165 states and 386 transitions. [2022-03-15 15:48:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:29,409 INFO L225 Difference]: With dead ends: 165 [2022-03-15 15:48:29,409 INFO L226 Difference]: Without dead ends: 165 [2022-03-15 15:48:29,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:29,409 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:29,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 84 Unchecked, 0.0s Time] [2022-03-15 15:48:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-15 15:48:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2022-03-15 15:48:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4335664335664338) internal successors, (348), 143 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 348 transitions. [2022-03-15 15:48:29,411 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 348 transitions. Word has length 17 [2022-03-15 15:48:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:29,411 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 348 transitions. [2022-03-15 15:48:29,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 348 transitions. [2022-03-15 15:48:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:29,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:29,411 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:29,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 15:48:29,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:29,627 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1078449885, now seen corresponding path program 118 times [2022-03-15 15:48:29,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:29,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927758928] [2022-03-15 15:48:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:29,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:29,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:29,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927758928] [2022-03-15 15:48:29,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927758928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:29,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392682793] [2022-03-15 15:48:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:29,677 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:29,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 15:48:29,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:29,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:29,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:29,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:29,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:29,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:29,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:29,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:29,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:29,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:48:29,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:29,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:29,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392682793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:29,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:29,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:29,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324471469] [2022-03-15 15:48:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:29,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:29,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:29,879 INFO L87 Difference]: Start difference. First operand 144 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:29,942 INFO L93 Difference]: Finished difference Result 168 states and 391 transitions. [2022-03-15 15:48:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:29,943 INFO L225 Difference]: With dead ends: 168 [2022-03-15 15:48:29,943 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 15:48:29,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:29,943 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-03-15 15:48:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 15:48:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 138. [2022-03-15 15:48:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.437956204379562) internal successors, (334), 137 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 334 transitions. [2022-03-15 15:48:29,945 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 334 transitions. Word has length 17 [2022-03-15 15:48:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:29,945 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 334 transitions. [2022-03-15 15:48:29,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 334 transitions. [2022-03-15 15:48:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:29,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:29,945 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:29,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:30,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 15:48:30,161 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash 218273093, now seen corresponding path program 119 times [2022-03-15 15:48:30,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:30,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428345201] [2022-03-15 15:48:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:30,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:30,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:30,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428345201] [2022-03-15 15:48:30,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428345201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:30,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80624481] [2022-03-15 15:48:30,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:30,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:30,238 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 15:48:30,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:30,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:48:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:30,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:48:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:30,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:30,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:30,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:48:30,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:30,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:48:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:30,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80624481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:30,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:30,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:48:30,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182854440] [2022-03-15 15:48:30,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:30,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:48:30,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:48:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:48:30,542 INFO L87 Difference]: Start difference. First operand 138 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:30,635 INFO L93 Difference]: Finished difference Result 154 states and 358 transitions. [2022-03-15 15:48:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:30,635 INFO L225 Difference]: With dead ends: 154 [2022-03-15 15:48:30,635 INFO L226 Difference]: Without dead ends: 149 [2022-03-15 15:48:30,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:30,636 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:30,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 83 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-03-15 15:48:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-15 15:48:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2022-03-15 15:48:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.404255319148936) internal successors, (339), 141 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 339 transitions. [2022-03-15 15:48:30,637 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 339 transitions. Word has length 17 [2022-03-15 15:48:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:30,638 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 339 transitions. [2022-03-15 15:48:30,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 339 transitions. [2022-03-15 15:48:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:30,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:30,638 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:30,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 15:48:30,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 15:48:30,838 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -699677097, now seen corresponding path program 120 times [2022-03-15 15:48:30,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:30,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180475242] [2022-03-15 15:48:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:30,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:30,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:30,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180475242] [2022-03-15 15:48:30,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180475242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:30,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953731001] [2022-03-15 15:48:30,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:30,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:30,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:30,935 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:30,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 15:48:30,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:30,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:31,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:31,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:48:31,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:31,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:48:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:31,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:31,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:31,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:48:31,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:31,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:48:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:31,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953731001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:31,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:31,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:48:31,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006534732] [2022-03-15 15:48:31,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:31,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:48:31,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:48:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:48:31,209 INFO L87 Difference]: Start difference. First operand 142 states and 339 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:31,257 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2022-03-15 15:48:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:31,258 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:48:31,258 INFO L226 Difference]: Without dead ends: 145 [2022-03-15 15:48:31,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:31,258 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:31,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 75 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-03-15 15:48:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-15 15:48:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2022-03-15 15:48:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.4306569343065694) internal successors, (333), 137 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 333 transitions. [2022-03-15 15:48:31,260 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 333 transitions. Word has length 17 [2022-03-15 15:48:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:31,260 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 333 transitions. [2022-03-15 15:48:31,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 333 transitions. [2022-03-15 15:48:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:31,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:31,260 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:31,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:31,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 15:48:31,476 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1157973431, now seen corresponding path program 121 times [2022-03-15 15:48:31,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:31,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111669197] [2022-03-15 15:48:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:31,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:31,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111669197] [2022-03-15 15:48:31,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111669197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:31,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958919342] [2022-03-15 15:48:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:31,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:31,541 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:31,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 15:48:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:31,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:31,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:31,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:31,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:31,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:31,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:31,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:31,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:31,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:31,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958919342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:31,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:31,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:31,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245634561] [2022-03-15 15:48:31,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:31,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:31,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:31,755 INFO L87 Difference]: Start difference. First operand 138 states and 333 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:31,810 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2022-03-15 15:48:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:31,810 INFO L225 Difference]: With dead ends: 153 [2022-03-15 15:48:31,810 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 15:48:31,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:31,811 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:31,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-03-15 15:48:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 15:48:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2022-03-15 15:48:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.4306569343065694) internal successors, (333), 137 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 333 transitions. [2022-03-15 15:48:31,824 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 333 transitions. Word has length 17 [2022-03-15 15:48:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:31,825 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 333 transitions. [2022-03-15 15:48:31,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 333 transitions. [2022-03-15 15:48:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:31,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:31,825 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:31,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 15:48:32,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:32,040 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2015858553, now seen corresponding path program 122 times [2022-03-15 15:48:32,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:32,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006144926] [2022-03-15 15:48:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:32,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:32,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006144926] [2022-03-15 15:48:32,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006144926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:32,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490869605] [2022-03-15 15:48:32,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:32,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:32,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:32,138 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:32,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 15:48:32,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:32,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:32,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:32,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:48:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:32,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:48:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:32,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:32,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:32,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:48:32,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:32,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:48:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:32,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490869605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:32,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:32,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:48:32,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209003211] [2022-03-15 15:48:32,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:32,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:48:32,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:48:32,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:32,423 INFO L87 Difference]: Start difference. First operand 138 states and 333 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:32,543 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2022-03-15 15:48:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:32,544 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:48:32,544 INFO L226 Difference]: Without dead ends: 145 [2022-03-15 15:48:32,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:32,544 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:32,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-03-15 15:48:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-15 15:48:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2022-03-15 15:48:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.423357664233577) internal successors, (332), 137 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2022-03-15 15:48:32,546 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 17 [2022-03-15 15:48:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:32,546 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2022-03-15 15:48:32,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2022-03-15 15:48:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:32,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:32,547 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:32,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:32,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:32,763 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:32,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1076577803, now seen corresponding path program 123 times [2022-03-15 15:48:32,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:32,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984361638] [2022-03-15 15:48:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:32,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:32,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:32,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984361638] [2022-03-15 15:48:32,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984361638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:32,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496066307] [2022-03-15 15:48:32,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:32,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:32,871 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:32,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 15:48:32,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:48:32,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:33,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:33,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:33,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:33,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:33,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:48:33,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:33,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:33,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496066307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:33,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:33,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:33,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065375407] [2022-03-15 15:48:33,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:33,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:33,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:33,197 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:33,382 INFO L93 Difference]: Finished difference Result 166 states and 379 transitions. [2022-03-15 15:48:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:33,383 INFO L225 Difference]: With dead ends: 166 [2022-03-15 15:48:33,383 INFO L226 Difference]: Without dead ends: 166 [2022-03-15 15:48:33,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:33,383 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:33,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 122 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 319 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-03-15 15:48:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-15 15:48:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 139. [2022-03-15 15:48:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.4347826086956523) internal successors, (336), 138 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 336 transitions. [2022-03-15 15:48:33,385 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 336 transitions. Word has length 17 [2022-03-15 15:48:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:33,385 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 336 transitions. [2022-03-15 15:48:33,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 336 transitions. [2022-03-15 15:48:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:33,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:33,386 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:33,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:33,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:33,586 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1944027451, now seen corresponding path program 124 times [2022-03-15 15:48:33,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:33,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321438895] [2022-03-15 15:48:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:33,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:33,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321438895] [2022-03-15 15:48:33,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321438895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:33,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993367487] [2022-03-15 15:48:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:33,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:33,679 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:33,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 15:48:33,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:33,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:33,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:33,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:33,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:33,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:33,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:33,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:48:33,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:33,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:33,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993367487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:33,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:33,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:33,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745794498] [2022-03-15 15:48:33,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:33,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:33,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:33,947 INFO L87 Difference]: Start difference. First operand 139 states and 336 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:34,149 INFO L93 Difference]: Finished difference Result 166 states and 377 transitions. [2022-03-15 15:48:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:48:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:34,150 INFO L225 Difference]: With dead ends: 166 [2022-03-15 15:48:34,150 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:48:34,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:34,150 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:34,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 103 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-03-15 15:48:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:48:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2022-03-15 15:48:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.4225352112676055) internal successors, (344), 142 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 344 transitions. [2022-03-15 15:48:34,152 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 344 transitions. Word has length 17 [2022-03-15 15:48:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:34,152 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 344 transitions. [2022-03-15 15:48:34,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 344 transitions. [2022-03-15 15:48:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:34,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:34,152 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:34,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:34,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 15:48:34,353 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash 283538937, now seen corresponding path program 125 times [2022-03-15 15:48:34,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:34,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424450517] [2022-03-15 15:48:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:34,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:34,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424450517] [2022-03-15 15:48:34,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424450517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:34,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339782711] [2022-03-15 15:48:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:34,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:34,472 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:34,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 15:48:34,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:34,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:34,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:34,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:34,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:34,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:34,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:34,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:34,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:48:34,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:34,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:34,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339782711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:34,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:34,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:34,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799110600] [2022-03-15 15:48:34,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:34,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:34,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:34,772 INFO L87 Difference]: Start difference. First operand 143 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:34,915 INFO L93 Difference]: Finished difference Result 151 states and 356 transitions. [2022-03-15 15:48:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:48:34,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:34,915 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:48:34,916 INFO L226 Difference]: Without dead ends: 151 [2022-03-15 15:48:34,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:34,916 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:34,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 238 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-03-15 15:48:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-15 15:48:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2022-03-15 15:48:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.427536231884058) internal successors, (335), 138 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 335 transitions. [2022-03-15 15:48:34,918 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 335 transitions. Word has length 17 [2022-03-15 15:48:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:34,918 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 335 transitions. [2022-03-15 15:48:34,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 335 transitions. [2022-03-15 15:48:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:34,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:34,918 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:34,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:35,135 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -111383479, now seen corresponding path program 126 times [2022-03-15 15:48:35,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:35,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748731384] [2022-03-15 15:48:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:35,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:35,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748731384] [2022-03-15 15:48:35,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748731384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:35,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719386215] [2022-03-15 15:48:35,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:35,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:35,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:35,198 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:35,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 15:48:35,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:48:35,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:35,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:35,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:35,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:35,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:35,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:35,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:48:35,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:35,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:35,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719386215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:35,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:35,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:35,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981287625] [2022-03-15 15:48:35,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:35,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:35,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:35,437 INFO L87 Difference]: Start difference. First operand 139 states and 335 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:35,521 INFO L93 Difference]: Finished difference Result 152 states and 356 transitions. [2022-03-15 15:48:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:48:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:35,521 INFO L225 Difference]: With dead ends: 152 [2022-03-15 15:48:35,521 INFO L226 Difference]: Without dead ends: 150 [2022-03-15 15:48:35,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:35,522 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:35,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-03-15 15:48:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-15 15:48:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2022-03-15 15:48:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.4296296296296296) internal successors, (328), 135 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2022-03-15 15:48:35,523 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 17 [2022-03-15 15:48:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:35,523 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2022-03-15 15:48:35,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2022-03-15 15:48:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:35,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:35,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:35,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:35,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:35,740 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2043771711, now seen corresponding path program 127 times [2022-03-15 15:48:35,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:35,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634916403] [2022-03-15 15:48:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:35,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:35,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634916403] [2022-03-15 15:48:35,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634916403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:35,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715944518] [2022-03-15 15:48:35,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:35,820 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:35,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 15:48:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:35,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:35,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:35,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:35,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:35,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:36,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:36,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:36,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:36,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:48:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:36,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715944518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:36,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:36,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:36,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030120059] [2022-03-15 15:48:36,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:36,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:36,103 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:36,312 INFO L93 Difference]: Finished difference Result 219 states and 484 transitions. [2022-03-15 15:48:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:36,313 INFO L225 Difference]: With dead ends: 219 [2022-03-15 15:48:36,313 INFO L226 Difference]: Without dead ends: 219 [2022-03-15 15:48:36,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:36,313 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:36,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 166 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 368 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-15 15:48:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-15 15:48:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 143. [2022-03-15 15:48:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.464788732394366) internal successors, (350), 142 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2022-03-15 15:48:36,315 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 17 [2022-03-15 15:48:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2022-03-15 15:48:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2022-03-15 15:48:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:36,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:36,316 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:36,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:36,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:36,516 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1130060273, now seen corresponding path program 128 times [2022-03-15 15:48:36,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:36,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52726418] [2022-03-15 15:48:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:36,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:36,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52726418] [2022-03-15 15:48:36,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52726418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:36,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80923242] [2022-03-15 15:48:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:36,600 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:36,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 15:48:36,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:36,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:36,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:48:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:36,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:48:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:36,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:36,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:36,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:48:36,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:36,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:48:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:36,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80923242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:36,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:36,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:48:36,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098756489] [2022-03-15 15:48:36,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:36,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:48:36,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:48:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:36,858 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:37,042 INFO L93 Difference]: Finished difference Result 197 states and 430 transitions. [2022-03-15 15:48:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:37,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:37,044 INFO L225 Difference]: With dead ends: 197 [2022-03-15 15:48:37,044 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 15:48:37,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:37,044 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:37,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 306 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-03-15 15:48:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 15:48:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 146. [2022-03-15 15:48:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.43448275862069) internal successors, (353), 145 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 353 transitions. [2022-03-15 15:48:37,046 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 353 transitions. Word has length 17 [2022-03-15 15:48:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:37,046 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 353 transitions. [2022-03-15 15:48:37,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 353 transitions. [2022-03-15 15:48:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:37,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:37,046 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:37,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:37,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 15:48:37,263 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1962376083, now seen corresponding path program 129 times [2022-03-15 15:48:37,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:37,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906869215] [2022-03-15 15:48:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:37,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:37,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906869215] [2022-03-15 15:48:37,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906869215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:37,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218705795] [2022-03-15 15:48:37,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:37,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:37,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:37,353 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:37,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 15:48:37,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:48:37,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:37,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:37,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:37,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:37,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:37,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:37,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:37,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:37,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:37,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:37,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:37,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218705795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:37,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:37,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:37,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169909157] [2022-03-15 15:48:37,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:37,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:37,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:37,635 INFO L87 Difference]: Start difference. First operand 146 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:38,142 INFO L93 Difference]: Finished difference Result 266 states and 570 transitions. [2022-03-15 15:48:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:48:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:38,142 INFO L225 Difference]: With dead ends: 266 [2022-03-15 15:48:38,143 INFO L226 Difference]: Without dead ends: 263 [2022-03-15 15:48:38,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:48:38,143 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:38,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 178 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 494 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-03-15 15:48:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-15 15:48:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 148. [2022-03-15 15:48:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.4625850340136055) internal successors, (362), 147 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2022-03-15 15:48:38,145 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 17 [2022-03-15 15:48:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:38,145 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2022-03-15 15:48:38,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2022-03-15 15:48:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:38,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:38,146 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:38,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:38,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 15:48:38,355 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash -602259343, now seen corresponding path program 130 times [2022-03-15 15:48:38,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:38,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075522158] [2022-03-15 15:48:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:38,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:38,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075522158] [2022-03-15 15:48:38,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075522158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:38,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509884330] [2022-03-15 15:48:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:38,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:38,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:38,442 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:38,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 15:48:38,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:38,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:38,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:38,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:38,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:38,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:38,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:38,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:38,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:38,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:48:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:38,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509884330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:38,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:38,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:38,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290900263] [2022-03-15 15:48:38,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:38,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:38,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:38,744 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:39,071 INFO L93 Difference]: Finished difference Result 249 states and 532 transitions. [2022-03-15 15:48:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:48:39,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:39,071 INFO L225 Difference]: With dead ends: 249 [2022-03-15 15:48:39,072 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 15:48:39,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:48:39,072 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:39,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 335 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 15:48:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 15:48:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 151. [2022-03-15 15:48:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.48) internal successors, (372), 150 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 372 transitions. [2022-03-15 15:48:39,074 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 372 transitions. Word has length 17 [2022-03-15 15:48:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:39,074 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 372 transitions. [2022-03-15 15:48:39,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 372 transitions. [2022-03-15 15:48:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:39,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:39,074 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:39,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:39,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 15:48:39,275 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 225807093, now seen corresponding path program 131 times [2022-03-15 15:48:39,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:39,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977468894] [2022-03-15 15:48:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:39,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:39,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:39,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977468894] [2022-03-15 15:48:39,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977468894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:39,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968535923] [2022-03-15 15:48:39,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:39,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:39,368 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:39,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 15:48:39,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:39,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:39,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:39,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:39,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:39,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:39,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:39,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:39,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:39,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:39,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:48:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:39,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968535923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:39,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:39,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:39,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94622759] [2022-03-15 15:48:39,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:39,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:39,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:39,656 INFO L87 Difference]: Start difference. First operand 151 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:39,956 INFO L93 Difference]: Finished difference Result 238 states and 513 transitions. [2022-03-15 15:48:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:48:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:39,956 INFO L225 Difference]: With dead ends: 238 [2022-03-15 15:48:39,956 INFO L226 Difference]: Without dead ends: 238 [2022-03-15 15:48:39,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:39,957 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:39,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 136 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-15 15:48:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 154. [2022-03-15 15:48:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.503267973856209) internal successors, (383), 153 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 383 transitions. [2022-03-15 15:48:39,959 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 383 transitions. Word has length 17 [2022-03-15 15:48:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:39,959 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 383 transitions. [2022-03-15 15:48:39,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 383 transitions. [2022-03-15 15:48:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:39,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:39,959 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:39,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:40,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 15:48:40,160 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash -641642555, now seen corresponding path program 132 times [2022-03-15 15:48:40,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:40,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108458331] [2022-03-15 15:48:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:40,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:40,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108458331] [2022-03-15 15:48:40,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108458331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:40,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563754295] [2022-03-15 15:48:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:40,233 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:40,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 15:48:40,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:40,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:40,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:40,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:40,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:40,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:40,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:40,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:40,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:40,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:40,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:48:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:40,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563754295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:40,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:40,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:40,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322706354] [2022-03-15 15:48:40,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:40,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:40,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:40,477 INFO L87 Difference]: Start difference. First operand 154 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:40,693 INFO L93 Difference]: Finished difference Result 231 states and 513 transitions. [2022-03-15 15:48:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:48:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:40,694 INFO L225 Difference]: With dead ends: 231 [2022-03-15 15:48:40,694 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 15:48:40,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:48:40,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 80 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:40,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 108 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 15:48:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 159. [2022-03-15 15:48:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.4873417721518987) internal successors, (393), 158 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2022-03-15 15:48:40,696 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 17 [2022-03-15 15:48:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:40,696 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2022-03-15 15:48:40,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2022-03-15 15:48:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:40,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:40,696 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:40,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:40,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-15 15:48:40,897 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1585923833, now seen corresponding path program 133 times [2022-03-15 15:48:40,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:40,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204157384] [2022-03-15 15:48:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:40,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:40,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:40,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204157384] [2022-03-15 15:48:40,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204157384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:40,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667931986] [2022-03-15 15:48:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:40,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:40,977 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:40,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 15:48:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:41,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:41,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:41,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:41,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:41,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:41,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:41,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:41,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:41,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:41,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667931986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:41,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:41,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:48:41,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65608708] [2022-03-15 15:48:41,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:41,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:48:41,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:41,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:48:41,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:48:41,238 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:41,558 INFO L93 Difference]: Finished difference Result 234 states and 523 transitions. [2022-03-15 15:48:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:48:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:41,559 INFO L225 Difference]: With dead ends: 234 [2022-03-15 15:48:41,559 INFO L226 Difference]: Without dead ends: 234 [2022-03-15 15:48:41,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:41,559 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:41,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 180 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-03-15 15:48:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 159. [2022-03-15 15:48:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.4873417721518987) internal successors, (393), 158 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2022-03-15 15:48:41,561 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 17 [2022-03-15 15:48:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:41,561 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2022-03-15 15:48:41,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2022-03-15 15:48:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:41,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:41,561 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:41,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:41,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:41,762 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1191001417, now seen corresponding path program 134 times [2022-03-15 15:48:41,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:41,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513572428] [2022-03-15 15:48:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:41,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:41,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513572428] [2022-03-15 15:48:41,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513572428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:41,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317653772] [2022-03-15 15:48:41,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:41,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:41,847 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:41,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 15:48:41,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:41,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:41,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:42,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:42,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:42,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:42,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:42,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:48:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:42,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317653772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:42,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:42,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:48:42,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717255028] [2022-03-15 15:48:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:42,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:48:42,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:48:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:48:42,114 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:42,430 INFO L93 Difference]: Finished difference Result 239 states and 515 transitions. [2022-03-15 15:48:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:48:42,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:42,430 INFO L225 Difference]: With dead ends: 239 [2022-03-15 15:48:42,430 INFO L226 Difference]: Without dead ends: 237 [2022-03-15 15:48:42,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:48:42,431 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:42,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 144 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-15 15:48:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 160. [2022-03-15 15:48:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.4716981132075473) internal successors, (393), 159 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 393 transitions. [2022-03-15 15:48:42,433 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 393 transitions. Word has length 17 [2022-03-15 15:48:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:42,433 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 393 transitions. [2022-03-15 15:48:42,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 393 transitions. [2022-03-15 15:48:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:42,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:42,433 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:42,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:42,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 15:48:42,634 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash -560246927, now seen corresponding path program 135 times [2022-03-15 15:48:42,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:42,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869654620] [2022-03-15 15:48:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:42,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:42,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869654620] [2022-03-15 15:48:42,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869654620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:42,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071413922] [2022-03-15 15:48:42,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:42,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:42,688 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:42,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 15:48:42,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:48:42,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:42,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:42,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:42,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:42,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:42,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:42,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:42,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:42,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:48:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:42,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071413922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:42,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:42,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:42,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781539947] [2022-03-15 15:48:42,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:42,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:42,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:42,869 INFO L87 Difference]: Start difference. First operand 160 states and 393 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:43,048 INFO L93 Difference]: Finished difference Result 216 states and 490 transitions. [2022-03-15 15:48:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:48:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:43,049 INFO L225 Difference]: With dead ends: 216 [2022-03-15 15:48:43,049 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:48:43,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:48:43,049 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:43,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 180 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:48:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2022-03-15 15:48:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.4740259740259742) internal successors, (381), 154 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2022-03-15 15:48:43,051 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 17 [2022-03-15 15:48:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:43,051 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2022-03-15 15:48:43,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2022-03-15 15:48:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:43,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:43,052 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:43,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:43,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:43,255 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash 655771615, now seen corresponding path program 136 times [2022-03-15 15:48:43,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:43,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41582237] [2022-03-15 15:48:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:43,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:43,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41582237] [2022-03-15 15:48:43,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41582237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:43,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511428413] [2022-03-15 15:48:43,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:43,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:43,357 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:43,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 15:48:43,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:43,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:43,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:43,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:48:43,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:43,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:48:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:43,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:43,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:48:43,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:43,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:48:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:43,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511428413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:43,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:43,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:48:43,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419527898] [2022-03-15 15:48:43,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:43,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:48:43,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:48:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:43,530 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:43,698 INFO L93 Difference]: Finished difference Result 192 states and 440 transitions. [2022-03-15 15:48:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:43,699 INFO L225 Difference]: With dead ends: 192 [2022-03-15 15:48:43,699 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 15:48:43,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:43,699 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:43,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 104 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 15:48:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 157. [2022-03-15 15:48:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.4551282051282053) internal successors, (383), 156 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 383 transitions. [2022-03-15 15:48:43,701 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 383 transitions. Word has length 17 [2022-03-15 15:48:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:43,701 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 383 transitions. [2022-03-15 15:48:43,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 383 transitions. [2022-03-15 15:48:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:43,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:43,702 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:43,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:43,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:43,918 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash -22737457, now seen corresponding path program 137 times [2022-03-15 15:48:43,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:43,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844339501] [2022-03-15 15:48:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:43,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:43,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844339501] [2022-03-15 15:48:43,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844339501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:43,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104629998] [2022-03-15 15:48:43,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:43,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:44,000 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:44,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 15:48:44,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:44,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:44,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:44,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:44,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:44,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:44,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:44,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:44,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:44,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:44,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:44,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:44,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104629998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:44,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:44,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:44,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105653973] [2022-03-15 15:48:44,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:44,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:44,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:44,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:44,305 INFO L87 Difference]: Start difference. First operand 157 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:44,384 INFO L93 Difference]: Finished difference Result 192 states and 453 transitions. [2022-03-15 15:48:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:44,384 INFO L225 Difference]: With dead ends: 192 [2022-03-15 15:48:44,384 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:48:44,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:44,385 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:44,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 103 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-03-15 15:48:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:48:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 163. [2022-03-15 15:48:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.450617283950617) internal successors, (397), 162 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 397 transitions. [2022-03-15 15:48:44,387 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 397 transitions. Word has length 17 [2022-03-15 15:48:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:44,387 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 397 transitions. [2022-03-15 15:48:44,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 397 transitions. [2022-03-15 15:48:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:44,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:44,387 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:44,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 15:48:44,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:44,588 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1714916739, now seen corresponding path program 138 times [2022-03-15 15:48:44,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:44,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082392212] [2022-03-15 15:48:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:44,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:44,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:44,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082392212] [2022-03-15 15:48:44,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082392212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:44,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382059227] [2022-03-15 15:48:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:44,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:44,662 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:44,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 15:48:44,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:44,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:44,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:44,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:44,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:44,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:44,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:44,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:44,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:48:44,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:44,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:44,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382059227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:44,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:44,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:44,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702316914] [2022-03-15 15:48:44,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:44,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:44,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:44,969 INFO L87 Difference]: Start difference. First operand 163 states and 397 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:45,116 INFO L93 Difference]: Finished difference Result 203 states and 474 transitions. [2022-03-15 15:48:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:48:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:45,117 INFO L225 Difference]: With dead ends: 203 [2022-03-15 15:48:45,117 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 15:48:45,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:45,117 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:45,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 105 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 396 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-03-15 15:48:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 15:48:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 157. [2022-03-15 15:48:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.4551282051282053) internal successors, (383), 156 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 383 transitions. [2022-03-15 15:48:45,119 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 383 transitions. Word has length 17 [2022-03-15 15:48:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:45,119 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 383 transitions. [2022-03-15 15:48:45,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 383 transitions. [2022-03-15 15:48:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:45,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:45,120 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:45,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:45,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:45,320 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1794440285, now seen corresponding path program 139 times [2022-03-15 15:48:45,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:45,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191091845] [2022-03-15 15:48:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:45,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:45,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191091845] [2022-03-15 15:48:45,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191091845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:45,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289621236] [2022-03-15 15:48:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:45,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:45,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:45,408 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:45,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 15:48:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:45,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:45,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:45,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:45,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:45,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:45,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:48:45,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:45,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:45,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289621236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:45,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:45,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:45,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138515715] [2022-03-15 15:48:45,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:45,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:45,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:45,736 INFO L87 Difference]: Start difference. First operand 157 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:45,889 INFO L93 Difference]: Finished difference Result 205 states and 476 transitions. [2022-03-15 15:48:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:48:45,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:45,890 INFO L225 Difference]: With dead ends: 205 [2022-03-15 15:48:45,890 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 15:48:45,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:48:45,890 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:45,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 103 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 197 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-03-15 15:48:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 15:48:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2022-03-15 15:48:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.450617283950617) internal successors, (397), 162 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 397 transitions. [2022-03-15 15:48:45,892 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 397 transitions. Word has length 17 [2022-03-15 15:48:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:45,892 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 397 transitions. [2022-03-15 15:48:45,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 397 transitions. [2022-03-15 15:48:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:45,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:45,893 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:45,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:46,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 15:48:46,099 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 783372597, now seen corresponding path program 140 times [2022-03-15 15:48:46,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:46,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993674916] [2022-03-15 15:48:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:46,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:46,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993674916] [2022-03-15 15:48:46,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993674916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:46,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744570312] [2022-03-15 15:48:46,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:46,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:46,179 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:46,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 15:48:46,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:46,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:46,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:46,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:46,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:46,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:46,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:46,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:46,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:46,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:46,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:46,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744570312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:46,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:46,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:46,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841872898] [2022-03-15 15:48:46,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:46,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:46,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:46,468 INFO L87 Difference]: Start difference. First operand 163 states and 397 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:46,623 INFO L93 Difference]: Finished difference Result 208 states and 485 transitions. [2022-03-15 15:48:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:48:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:46,624 INFO L225 Difference]: With dead ends: 208 [2022-03-15 15:48:46,624 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 15:48:46,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:48:46,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:46,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 118 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 349 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2022-03-15 15:48:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 15:48:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2022-03-15 15:48:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.4551282051282053) internal successors, (383), 156 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 383 transitions. [2022-03-15 15:48:46,643 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 383 transitions. Word has length 17 [2022-03-15 15:48:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:46,643 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 383 transitions. [2022-03-15 15:48:46,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 383 transitions. [2022-03-15 15:48:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:46,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:46,644 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:46,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:46,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 15:48:46,844 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1379391699, now seen corresponding path program 141 times [2022-03-15 15:48:46,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:46,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639900771] [2022-03-15 15:48:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:46,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:46,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639900771] [2022-03-15 15:48:46,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639900771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:46,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859791898] [2022-03-15 15:48:46,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:46,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:46,964 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:46,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 15:48:47,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:48:47,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:48:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:47,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:47,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:48:47,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:47,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:48:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:47,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:47,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:47,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:47,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:47,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:47,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859791898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:47,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:47,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:47,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416343769] [2022-03-15 15:48:47,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:47,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:47,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:47,381 INFO L87 Difference]: Start difference. First operand 157 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:47,484 INFO L93 Difference]: Finished difference Result 170 states and 404 transitions. [2022-03-15 15:48:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:48:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:47,485 INFO L225 Difference]: With dead ends: 170 [2022-03-15 15:48:47,485 INFO L226 Difference]: Without dead ends: 161 [2022-03-15 15:48:47,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:48:47,485 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:47,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-03-15 15:48:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-15 15:48:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2022-03-15 15:48:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.445859872611465) internal successors, (384), 157 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 384 transitions. [2022-03-15 15:48:47,487 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 384 transitions. Word has length 17 [2022-03-15 15:48:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:47,487 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 384 transitions. [2022-03-15 15:48:47,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 384 transitions. [2022-03-15 15:48:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:47,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:47,488 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:47,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 15:48:47,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-15 15:48:47,704 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1713044657, now seen corresponding path program 142 times [2022-03-15 15:48:47,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:47,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080966151] [2022-03-15 15:48:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:47,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:47,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080966151] [2022-03-15 15:48:47,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080966151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:47,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98840599] [2022-03-15 15:48:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:47,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:47,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:47,760 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:47,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 15:48:47,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:47,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:47,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:47,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:47,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:47,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:47,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:47,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:47,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:47,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:47,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:47,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:48,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98840599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:48,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:48,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:48,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591830136] [2022-03-15 15:48:48,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:48,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:48,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:48,020 INFO L87 Difference]: Start difference. First operand 158 states and 384 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:48,325 INFO L93 Difference]: Finished difference Result 220 states and 497 transitions. [2022-03-15 15:48:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:48,326 INFO L225 Difference]: With dead ends: 220 [2022-03-15 15:48:48,326 INFO L226 Difference]: Without dead ends: 220 [2022-03-15 15:48:48,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:48:48,326 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:48,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 141 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 387 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-03-15 15:48:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-15 15:48:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2022-03-15 15:48:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.4556962025316458) internal successors, (388), 158 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2022-03-15 15:48:48,328 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 17 [2022-03-15 15:48:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2022-03-15 15:48:48,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2022-03-15 15:48:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:48,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:48,329 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:48,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:48,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 15:48:48,535 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1714472991, now seen corresponding path program 143 times [2022-03-15 15:48:48,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:48,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542053672] [2022-03-15 15:48:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:48,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:48,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542053672] [2022-03-15 15:48:48,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542053672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:48,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422472808] [2022-03-15 15:48:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:48,637 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:48,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 15:48:48,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:48,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:48,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:48,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:48,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:48,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:48,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:48,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:48,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:48:48,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:48,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:48,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422472808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:48,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:48,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:48,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091949251] [2022-03-15 15:48:48,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:48,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:48,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:48,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:48,979 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:49,345 INFO L93 Difference]: Finished difference Result 225 states and 495 transitions. [2022-03-15 15:48:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:48:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:49,346 INFO L225 Difference]: With dead ends: 225 [2022-03-15 15:48:49,346 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:48:49,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:48:49,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:49,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 126 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 287 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-03-15 15:48:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:48:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 164. [2022-03-15 15:48:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4355828220858897) internal successors, (397), 163 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 397 transitions. [2022-03-15 15:48:49,348 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 397 transitions. Word has length 17 [2022-03-15 15:48:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:49,348 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 397 transitions. [2022-03-15 15:48:49,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 397 transitions. [2022-03-15 15:48:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:49,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:49,349 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:49,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:49,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:49,549 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash -352927917, now seen corresponding path program 144 times [2022-03-15 15:48:49,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:49,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078706912] [2022-03-15 15:48:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:49,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:49,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:49,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078706912] [2022-03-15 15:48:49,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078706912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:49,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491276030] [2022-03-15 15:48:49,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:49,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:49,629 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:49,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 15:48:49,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:49,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:49,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:49,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:49,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:49,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:49,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:49,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:49,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:48:49,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:49,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:49,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491276030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:49,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:49,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:49,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764200036] [2022-03-15 15:48:49,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:49,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:49,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:49,988 INFO L87 Difference]: Start difference. First operand 164 states and 397 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:50,198 INFO L93 Difference]: Finished difference Result 196 states and 450 transitions. [2022-03-15 15:48:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:48:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:50,198 INFO L225 Difference]: With dead ends: 196 [2022-03-15 15:48:50,198 INFO L226 Difference]: Without dead ends: 196 [2022-03-15 15:48:50,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:48:50,199 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:50,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 154 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-03-15 15:48:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-15 15:48:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 159. [2022-03-15 15:48:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.4430379746835444) internal successors, (386), 158 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 386 transitions. [2022-03-15 15:48:50,201 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 386 transitions. Word has length 17 [2022-03-15 15:48:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:50,201 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 386 transitions. [2022-03-15 15:48:50,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 386 transitions. [2022-03-15 15:48:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:50,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:50,201 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:50,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-15 15:48:50,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-15 15:48:50,403 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -75214173, now seen corresponding path program 145 times [2022-03-15 15:48:50,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:50,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160510433] [2022-03-15 15:48:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:50,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:50,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160510433] [2022-03-15 15:48:50,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160510433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:50,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657946440] [2022-03-15 15:48:50,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:50,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:50,474 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:50,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 15:48:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:50,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:50,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:50,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:50,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:50,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:50,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:50,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:50,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:50,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:50,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657946440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:50,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:50,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:50,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855006217] [2022-03-15 15:48:50,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:50,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:50,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:50,718 INFO L87 Difference]: Start difference. First operand 159 states and 386 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:50,804 INFO L93 Difference]: Finished difference Result 209 states and 487 transitions. [2022-03-15 15:48:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:48:50,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:50,805 INFO L225 Difference]: With dead ends: 209 [2022-03-15 15:48:50,805 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 15:48:50,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:50,805 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:50,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-15 15:48:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 15:48:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 162. [2022-03-15 15:48:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.459627329192547) internal successors, (396), 161 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2022-03-15 15:48:50,807 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 17 [2022-03-15 15:48:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:50,807 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2022-03-15 15:48:50,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2022-03-15 15:48:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:50,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:50,821 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:50,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:51,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:51,022 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash 6181455, now seen corresponding path program 146 times [2022-03-15 15:48:51,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:51,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404262995] [2022-03-15 15:48:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:51,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:51,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404262995] [2022-03-15 15:48:51,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404262995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:51,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778768982] [2022-03-15 15:48:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:51,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:51,081 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 15:48:51,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:51,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:51,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:51,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:51,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:51,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:51,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:51,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:51,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:48:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:51,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778768982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:51,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:51,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:51,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880516093] [2022-03-15 15:48:51,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:51,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:51,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:51,306 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:51,464 INFO L93 Difference]: Finished difference Result 273 states and 593 transitions. [2022-03-15 15:48:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:48:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:51,465 INFO L225 Difference]: With dead ends: 273 [2022-03-15 15:48:51,465 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 15:48:51,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:51,465 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:51,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 428 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-15 15:48:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 15:48:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 164. [2022-03-15 15:48:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.478527607361963) internal successors, (404), 163 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2022-03-15 15:48:51,468 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 17 [2022-03-15 15:48:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:51,468 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2022-03-15 15:48:51,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2022-03-15 15:48:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:51,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:51,468 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:51,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:51,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:51,684 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:51,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:51,684 INFO L85 PathProgramCache]: Analyzing trace with hash -861268193, now seen corresponding path program 147 times [2022-03-15 15:48:51,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:51,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402977053] [2022-03-15 15:48:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:51,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:51,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:51,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402977053] [2022-03-15 15:48:51,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402977053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:51,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965315775] [2022-03-15 15:48:51,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:51,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:51,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:51,739 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:51,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 15:48:51,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:48:51,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:48:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:51,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:51,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:51,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:51,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:48:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:51,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:51,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:51,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:51,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:51,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:48:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:51,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965315775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:51,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:51,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:51,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842782345] [2022-03-15 15:48:51,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:51,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:51,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:51,943 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:52,115 INFO L93 Difference]: Finished difference Result 248 states and 540 transitions. [2022-03-15 15:48:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:48:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:52,116 INFO L225 Difference]: With dead ends: 248 [2022-03-15 15:48:52,116 INFO L226 Difference]: Without dead ends: 242 [2022-03-15 15:48:52,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:52,116 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:52,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 147 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 421 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-03-15 15:48:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-15 15:48:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 168. [2022-03-15 15:48:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.461077844311377) internal successors, (411), 167 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 411 transitions. [2022-03-15 15:48:52,120 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 411 transitions. Word has length 17 [2022-03-15 15:48:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:52,121 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 411 transitions. [2022-03-15 15:48:52,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 411 transitions. [2022-03-15 15:48:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:52,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:52,121 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:52,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:52,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:52,337 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1366298195, now seen corresponding path program 148 times [2022-03-15 15:48:52,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:52,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944223956] [2022-03-15 15:48:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:52,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:52,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944223956] [2022-03-15 15:48:52,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944223956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:52,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645433348] [2022-03-15 15:48:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:52,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:52,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:52,432 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:52,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 15:48:52,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:52,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:52,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:52,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:52,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:52,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:52,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:52,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:52,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:52,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:52,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:48:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:52,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645433348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:52,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:52,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:48:52,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912586783] [2022-03-15 15:48:52,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:52,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:48:52,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:48:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:48:52,648 INFO L87 Difference]: Start difference. First operand 168 states and 411 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:52,851 INFO L93 Difference]: Finished difference Result 228 states and 506 transitions. [2022-03-15 15:48:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:48:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:52,852 INFO L225 Difference]: With dead ends: 228 [2022-03-15 15:48:52,852 INFO L226 Difference]: Without dead ends: 228 [2022-03-15 15:48:52,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:52,852 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:52,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 274 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 614 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:48:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-15 15:48:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 162. [2022-03-15 15:48:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.4658385093167703) internal successors, (397), 161 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2022-03-15 15:48:52,854 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 17 [2022-03-15 15:48:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:52,854 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2022-03-15 15:48:52,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2022-03-15 15:48:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:52,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:52,855 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:52,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:53,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:53,059 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 971375779, now seen corresponding path program 149 times [2022-03-15 15:48:53,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:53,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122515429] [2022-03-15 15:48:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:53,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:53,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122515429] [2022-03-15 15:48:53,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122515429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:53,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943137551] [2022-03-15 15:48:53,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:53,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:53,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:53,136 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:53,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 15:48:53,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:48:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:53,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:53,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:53,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:53,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:53,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:53,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:53,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:48:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:53,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943137551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:53,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:53,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:53,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029820648] [2022-03-15 15:48:53,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:53,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:53,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:53,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:53,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:53,408 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:53,567 INFO L93 Difference]: Finished difference Result 228 states and 512 transitions. [2022-03-15 15:48:53,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:53,568 INFO L225 Difference]: With dead ends: 228 [2022-03-15 15:48:53,568 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 15:48:53,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:48:53,568 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:53,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 157 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 440 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-03-15 15:48:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 15:48:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 161. [2022-03-15 15:48:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.4625) internal successors, (394), 160 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 394 transitions. [2022-03-15 15:48:53,570 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 394 transitions. Word has length 17 [2022-03-15 15:48:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:53,571 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 394 transitions. [2022-03-15 15:48:53,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 394 transitions. [2022-03-15 15:48:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:53,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:53,571 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:53,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:53,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-03-15 15:48:53,786 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2100602665, now seen corresponding path program 150 times [2022-03-15 15:48:53,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:53,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834458338] [2022-03-15 15:48:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:53,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:53,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:53,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834458338] [2022-03-15 15:48:53,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834458338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:53,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651861270] [2022-03-15 15:48:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:53,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:53,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:53,889 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:53,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 15:48:53,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:48:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:53,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:53,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:54,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:54,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:54,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:54,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:54,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:48:54,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:54,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:48:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:54,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651861270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:54,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:54,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:54,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025181191] [2022-03-15 15:48:54,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:54,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:54,175 INFO L87 Difference]: Start difference. First operand 161 states and 394 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:54,510 INFO L93 Difference]: Finished difference Result 287 states and 591 transitions. [2022-03-15 15:48:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:54,511 INFO L225 Difference]: With dead ends: 287 [2022-03-15 15:48:54,511 INFO L226 Difference]: Without dead ends: 287 [2022-03-15 15:48:54,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:48:54,511 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 109 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:54,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 241 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-15 15:48:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 163. [2022-03-15 15:48:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.4753086419753085) internal successors, (401), 162 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2022-03-15 15:48:54,514 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 17 [2022-03-15 15:48:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:54,514 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2022-03-15 15:48:54,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2022-03-15 15:48:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:54,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:54,514 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:54,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-15 15:48:54,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-15 15:48:54,731 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914983, now seen corresponding path program 151 times [2022-03-15 15:48:54,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:54,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210211365] [2022-03-15 15:48:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:54,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:54,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210211365] [2022-03-15 15:48:54,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210211365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:54,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455824532] [2022-03-15 15:48:54,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:48:54,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:54,803 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:54,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 15:48:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:54,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:54,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:54,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:54,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:54,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:54,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:54,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:54,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:54,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:55,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455824532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:55,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:55,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:55,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567407500] [2022-03-15 15:48:55,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:55,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:55,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:55,027 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:55,400 INFO L93 Difference]: Finished difference Result 248 states and 545 transitions. [2022-03-15 15:48:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:48:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:55,400 INFO L225 Difference]: With dead ends: 248 [2022-03-15 15:48:55,400 INFO L226 Difference]: Without dead ends: 235 [2022-03-15 15:48:55,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:48:55,401 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 104 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-15 15:48:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 170. [2022-03-15 15:48:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.4615384615384617) internal successors, (416), 169 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 416 transitions. [2022-03-15 15:48:55,403 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 416 transitions. Word has length 17 [2022-03-15 15:48:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:55,403 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 416 transitions. [2022-03-15 15:48:55,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 416 transitions. [2022-03-15 15:48:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:55,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:55,404 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:55,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:55,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-15 15:48:55,604 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash -740485925, now seen corresponding path program 152 times [2022-03-15 15:48:55,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:55,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221867148] [2022-03-15 15:48:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:55,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:55,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:55,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221867148] [2022-03-15 15:48:55,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221867148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:55,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971001593] [2022-03-15 15:48:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:55,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:55,680 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 15:48:55,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:55,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:55,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:48:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:55,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:55,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:55,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:55,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:48:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:55,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:55,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:55,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:55,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:55,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:55,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971001593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:55,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:55,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:48:55,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940095644] [2022-03-15 15:48:55,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:55,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:48:55,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:48:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:48:55,977 INFO L87 Difference]: Start difference. First operand 170 states and 416 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,325 INFO L93 Difference]: Finished difference Result 230 states and 518 transitions. [2022-03-15 15:48:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:48:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,326 INFO L225 Difference]: With dead ends: 230 [2022-03-15 15:48:56,326 INFO L226 Difference]: Without dead ends: 230 [2022-03-15 15:48:56,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:48:56,326 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 104 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-15 15:48:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 169. [2022-03-15 15:48:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4404761904761907) internal successors, (410), 168 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 410 transitions. [2022-03-15 15:48:56,328 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 410 transitions. Word has length 17 [2022-03-15 15:48:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,329 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 410 transitions. [2022-03-15 15:48:56,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 410 transitions. [2022-03-15 15:48:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:56,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,329 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:56,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 15:48:56,545 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1408310611, now seen corresponding path program 153 times [2022-03-15 15:48:56,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954227161] [2022-03-15 15:48:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954227161] [2022-03-15 15:48:56,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954227161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:56,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239415656] [2022-03-15 15:48:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:48:56,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:56,595 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:56,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 15:48:56,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:48:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:56,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:56,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:56,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:48:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:56,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:56,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:56,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:56,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239415656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:56,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:56,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:56,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251706814] [2022-03-15 15:48:56,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:56,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:56,771 INFO L87 Difference]: Start difference. First operand 169 states and 410 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,920 INFO L93 Difference]: Finished difference Result 211 states and 481 transitions. [2022-03-15 15:48:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:48:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,921 INFO L225 Difference]: With dead ends: 211 [2022-03-15 15:48:56,921 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:48:56,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:48:56,921 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 107 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:48:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 164. [2022-03-15 15:48:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4355828220858897) internal successors, (397), 163 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 397 transitions. [2022-03-15 15:48:56,923 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 397 transitions. Word has length 17 [2022-03-15 15:48:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,923 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 397 transitions. [2022-03-15 15:48:56,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 397 transitions. [2022-03-15 15:48:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:56,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,924 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:57,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 15:48:57,139 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1308566351, now seen corresponding path program 154 times [2022-03-15 15:48:57,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:57,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149557409] [2022-03-15 15:48:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:57,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149557409] [2022-03-15 15:48:57,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149557409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:57,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961412889] [2022-03-15 15:48:57,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:48:57,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:57,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:57,245 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:57,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 15:48:57,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:48:57,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:57,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:57,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:57,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:57,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:57,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:57,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:57,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:48:57,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:57,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961412889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:57,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:57,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:48:57,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832838632] [2022-03-15 15:48:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:57,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:48:57,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:48:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:48:57,584 INFO L87 Difference]: Start difference. First operand 164 states and 397 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:57,871 INFO L93 Difference]: Finished difference Result 245 states and 530 transitions. [2022-03-15 15:48:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:48:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:57,871 INFO L225 Difference]: With dead ends: 245 [2022-03-15 15:48:57,871 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 15:48:57,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:48:57,872 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:57,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 119 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 15:48:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 168. [2022-03-15 15:48:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4550898203592815) internal successors, (410), 167 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 410 transitions. [2022-03-15 15:48:57,874 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 410 transitions. Word has length 17 [2022-03-15 15:48:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:57,874 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 410 transitions. [2022-03-15 15:48:57,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 410 transitions. [2022-03-15 15:48:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:57,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:57,875 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:57,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:58,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:58,087 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:58,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1626284205, now seen corresponding path program 155 times [2022-03-15 15:48:58,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:58,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195668681] [2022-03-15 15:48:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:58,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:58,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:58,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195668681] [2022-03-15 15:48:58,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195668681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:58,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839986279] [2022-03-15 15:48:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:48:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:58,168 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:58,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 15:48:58,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:48:58,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:48:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:58,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:48:58,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:58,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:48:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:58,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:58,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:58,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:48:58,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:58,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:48:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:58,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839986279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:58,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:58,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:48:58,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693465801] [2022-03-15 15:48:58,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:58,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:48:58,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:48:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:48:58,470 INFO L87 Difference]: Start difference. First operand 168 states and 410 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:58,961 INFO L93 Difference]: Finished difference Result 239 states and 541 transitions. [2022-03-15 15:48:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:48:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:58,961 INFO L225 Difference]: With dead ends: 239 [2022-03-15 15:48:58,961 INFO L226 Difference]: Without dead ends: 239 [2022-03-15 15:48:58,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:48:58,962 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:58,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 174 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-15 15:48:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 170. [2022-03-15 15:48:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.467455621301775) internal successors, (417), 169 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2022-03-15 15:48:58,964 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 17 [2022-03-15 15:48:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:58,964 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2022-03-15 15:48:58,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2022-03-15 15:48:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:58,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:58,965 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:58,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:59,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:59,165 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2021206621, now seen corresponding path program 156 times [2022-03-15 15:48:59,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:59,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66211248] [2022-03-15 15:48:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:59,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:59,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66211248] [2022-03-15 15:48:59,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66211248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:59,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346956928] [2022-03-15 15:48:59,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:48:59,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:59,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:59,283 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:48:59,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 15:48:59,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:48:59,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:59,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:48:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:59,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:59,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:48:59,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:48:59,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:48:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:59,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:59,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:59,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:48:59,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:59,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:48:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:59,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346956928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:59,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:59,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:48:59,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354445425] [2022-03-15 15:48:59,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:59,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:48:59,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:48:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:48:59,614 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:59,959 INFO L93 Difference]: Finished difference Result 251 states and 542 transitions. [2022-03-15 15:48:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:48:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:48:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:59,960 INFO L225 Difference]: With dead ends: 251 [2022-03-15 15:48:59,960 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 15:48:59,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:48:59,960 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:59,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 166 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:48:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 15:48:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 170. [2022-03-15 15:48:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.467455621301775) internal successors, (417), 169 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2022-03-15 15:48:59,962 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 17 [2022-03-15 15:48:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:59,962 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2022-03-15 15:48:59,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2022-03-15 15:48:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:48:59,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:59,963 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:59,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:00,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-15 15:49:00,175 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 522512331, now seen corresponding path program 157 times [2022-03-15 15:49:00,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:00,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251269331] [2022-03-15 15:49:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:00,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:00,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251269331] [2022-03-15 15:49:00,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251269331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:00,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224559434] [2022-03-15 15:49:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:00,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:00,254 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:00,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 15:49:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:00,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:00,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:00,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:00,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:00,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:00,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:00,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:00,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224559434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:00,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:00,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:00,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141602374] [2022-03-15 15:49:00,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:00,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:00,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:00,582 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:00,863 INFO L93 Difference]: Finished difference Result 208 states and 489 transitions. [2022-03-15 15:49:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:00,864 INFO L225 Difference]: With dead ends: 208 [2022-03-15 15:49:00,864 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 15:49:00,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:00,865 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:00,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 88 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 15:49:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2022-03-15 15:49:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.467455621301775) internal successors, (417), 169 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2022-03-15 15:49:00,867 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 17 [2022-03-15 15:49:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:00,867 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2022-03-15 15:49:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2022-03-15 15:49:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:00,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:00,867 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:00,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:01,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:01,083 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:01,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1738530873, now seen corresponding path program 158 times [2022-03-15 15:49:01,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:01,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86597188] [2022-03-15 15:49:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:01,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:01,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86597188] [2022-03-15 15:49:01,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86597188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:01,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274439078] [2022-03-15 15:49:01,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:01,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:01,151 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:01,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 15:49:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:01,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:01,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:49:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:01,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:49:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:01,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:01,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:49:01,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:01,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:49:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:01,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274439078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:01,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:01,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:01,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791741398] [2022-03-15 15:49:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:01,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:01,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:01,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:01,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:01,456 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:01,741 INFO L93 Difference]: Finished difference Result 199 states and 458 transitions. [2022-03-15 15:49:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:01,742 INFO L225 Difference]: With dead ends: 199 [2022-03-15 15:49:01,742 INFO L226 Difference]: Without dead ends: 195 [2022-03-15 15:49:01,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:01,742 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:01,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 97 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-15 15:49:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2022-03-15 15:49:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4642857142857144) internal successors, (414), 168 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 414 transitions. [2022-03-15 15:49:01,745 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 414 transitions. Word has length 17 [2022-03-15 15:49:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:01,745 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 414 transitions. [2022-03-15 15:49:01,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 414 transitions. [2022-03-15 15:49:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:01,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:01,745 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:01,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:01,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:01,967 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1584271789, now seen corresponding path program 159 times [2022-03-15 15:49:01,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:01,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708744705] [2022-03-15 15:49:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:02,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708744705] [2022-03-15 15:49:02,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708744705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:02,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264063566] [2022-03-15 15:49:02,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:02,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:02,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:02,023 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:02,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 15:49:02,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:02,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:02,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:02,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:02,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:02,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:49:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:02,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:02,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:02,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:02,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264063566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:02,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:02,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:02,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924391549] [2022-03-15 15:49:02,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:02,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:02,232 INFO L87 Difference]: Start difference. First operand 169 states and 414 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:02,321 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2022-03-15 15:49:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:49:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:02,321 INFO L225 Difference]: With dead ends: 203 [2022-03-15 15:49:02,321 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 15:49:02,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:02,322 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:02,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 89 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 15:49:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 167. [2022-03-15 15:49:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4518072289156625) internal successors, (407), 166 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 407 transitions. [2022-03-15 15:49:02,324 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 407 transitions. Word has length 17 [2022-03-15 15:49:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:02,324 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 407 transitions. [2022-03-15 15:49:02,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 407 transitions. [2022-03-15 15:49:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:02,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:02,324 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:02,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:02,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:02,540 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:02,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1968691101, now seen corresponding path program 160 times [2022-03-15 15:49:02,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:02,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722966484] [2022-03-15 15:49:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:02,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:02,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722966484] [2022-03-15 15:49:02,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722966484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:02,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258023906] [2022-03-15 15:49:02,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:02,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:02,596 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:02,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 15:49:02,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:02,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:02,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:49:02,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:02,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:49:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:02,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:02,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:49:02,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:02,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:49:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258023906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:02,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:02,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:02,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617765768] [2022-03-15 15:49:02,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:02,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:02,770 INFO L87 Difference]: Start difference. First operand 167 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:02,884 INFO L93 Difference]: Finished difference Result 194 states and 445 transitions. [2022-03-15 15:49:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:02,885 INFO L225 Difference]: With dead ends: 194 [2022-03-15 15:49:02,885 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 15:49:02,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:02,885 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:02,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 87 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 15:49:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 169. [2022-03-15 15:49:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4345238095238093) internal successors, (409), 168 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 409 transitions. [2022-03-15 15:49:02,887 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 409 transitions. Word has length 17 [2022-03-15 15:49:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:02,887 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 409 transitions. [2022-03-15 15:49:02,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 409 transitions. [2022-03-15 15:49:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:02,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:02,888 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:02,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:03,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:03,104 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash -560230313, now seen corresponding path program 161 times [2022-03-15 15:49:03,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:03,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084332341] [2022-03-15 15:49:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:03,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:03,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:03,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084332341] [2022-03-15 15:49:03,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084332341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:03,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480372028] [2022-03-15 15:49:03,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:03,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:03,205 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:03,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 15:49:03,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:03,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:03,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:03,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:03,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:03,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:03,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:03,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:03,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:03,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:03,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:03,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:03,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480372028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:03,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:03,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:03,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052246854] [2022-03-15 15:49:03,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:03,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:03,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:03,453 INFO L87 Difference]: Start difference. First operand 169 states and 409 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:03,597 INFO L93 Difference]: Finished difference Result 221 states and 507 transitions. [2022-03-15 15:49:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:03,598 INFO L225 Difference]: With dead ends: 221 [2022-03-15 15:49:03,598 INFO L226 Difference]: Without dead ends: 221 [2022-03-15 15:49:03,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:03,598 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:03,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 148 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-15 15:49:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2022-03-15 15:49:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.447058823529412) internal successors, (416), 170 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 416 transitions. [2022-03-15 15:49:03,600 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 416 transitions. Word has length 17 [2022-03-15 15:49:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:03,600 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 416 transitions. [2022-03-15 15:49:03,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 416 transitions. [2022-03-15 15:49:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:03,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:03,600 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:03,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-15 15:49:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-15 15:49:03,817 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash -955686617, now seen corresponding path program 162 times [2022-03-15 15:49:03,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:03,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320823098] [2022-03-15 15:49:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:03,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:03,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:03,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320823098] [2022-03-15 15:49:03,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320823098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:03,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153369220] [2022-03-15 15:49:03,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:03,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:03,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:03,894 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:03,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 15:49:03,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:03,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:03,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:49:03,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:03,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:49:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:04,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:04,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:04,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:49:04,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:04,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:49:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:04,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153369220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:04,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:04,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:04,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102746684] [2022-03-15 15:49:04,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:04,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:04,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:04,086 INFO L87 Difference]: Start difference. First operand 171 states and 416 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:04,220 INFO L93 Difference]: Finished difference Result 206 states and 472 transitions. [2022-03-15 15:49:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:04,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:04,221 INFO L225 Difference]: With dead ends: 206 [2022-03-15 15:49:04,221 INFO L226 Difference]: Without dead ends: 197 [2022-03-15 15:49:04,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:04,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:04,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 120 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:04,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-15 15:49:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 177. [2022-03-15 15:49:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.414772727272727) internal successors, (425), 176 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 425 transitions. [2022-03-15 15:49:04,223 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 425 transitions. Word has length 17 [2022-03-15 15:49:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:04,223 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 425 transitions. [2022-03-15 15:49:04,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 425 transitions. [2022-03-15 15:49:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:04,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:04,224 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:04,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:04,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 15:49:04,437 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1963034155, now seen corresponding path program 163 times [2022-03-15 15:49:04,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:04,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676782140] [2022-03-15 15:49:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:04,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:04,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676782140] [2022-03-15 15:49:04,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676782140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:04,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237299668] [2022-03-15 15:49:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:04,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:04,491 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:04,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 15:49:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:04,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:04,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:04,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:04,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:04,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:04,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:04,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:04,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:04,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:04,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:04,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237299668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:04,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:04,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:04,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018078085] [2022-03-15 15:49:04,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:04,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:04,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:04,693 INFO L87 Difference]: Start difference. First operand 177 states and 425 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:04,928 INFO L93 Difference]: Finished difference Result 238 states and 540 transitions. [2022-03-15 15:49:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:49:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:04,929 INFO L225 Difference]: With dead ends: 238 [2022-03-15 15:49:04,929 INFO L226 Difference]: Without dead ends: 232 [2022-03-15 15:49:04,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:04,929 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:04,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 96 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-15 15:49:04,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 170. [2022-03-15 15:49:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.42603550295858) internal successors, (410), 169 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2022-03-15 15:49:04,931 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 17 [2022-03-15 15:49:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:04,931 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2022-03-15 15:49:04,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2022-03-15 15:49:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:04,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:04,932 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:04,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:05,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:05,148 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2044429783, now seen corresponding path program 164 times [2022-03-15 15:49:05,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:05,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436701269] [2022-03-15 15:49:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:05,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:05,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:05,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436701269] [2022-03-15 15:49:05,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436701269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:05,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113304820] [2022-03-15 15:49:05,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:05,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:05,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:05,216 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:05,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 15:49:05,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:05,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:05,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:05,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:05,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:05,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:05,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:05,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:05,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:05,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:05,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113304820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:05,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:05,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:05,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131238101] [2022-03-15 15:49:05,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:05,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:05,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:05,445 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:05,852 INFO L93 Difference]: Finished difference Result 262 states and 580 transitions. [2022-03-15 15:49:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:49:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:05,853 INFO L225 Difference]: With dead ends: 262 [2022-03-15 15:49:05,853 INFO L226 Difference]: Without dead ends: 262 [2022-03-15 15:49:05,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:49:05,853 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:05,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 143 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-15 15:49:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 171. [2022-03-15 15:49:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4352941176470586) internal successors, (414), 170 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 414 transitions. [2022-03-15 15:49:05,856 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 414 transitions. Word has length 17 [2022-03-15 15:49:05,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:05,856 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 414 transitions. [2022-03-15 15:49:05,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:05,856 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 414 transitions. [2022-03-15 15:49:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:05,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:05,856 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:05,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-15 15:49:06,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 15:49:06,072 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1176980135, now seen corresponding path program 165 times [2022-03-15 15:49:06,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:06,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505258594] [2022-03-15 15:49:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:06,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:06,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505258594] [2022-03-15 15:49:06,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505258594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:06,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121834046] [2022-03-15 15:49:06,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:06,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:06,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:06,141 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:06,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 15:49:06,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:06,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:06,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:06,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:06,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:06,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:06,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:06,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:06,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:06,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:06,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:06,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121834046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:06,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:06,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:06,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921884712] [2022-03-15 15:49:06,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:06,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:06,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:06,346 INFO L87 Difference]: Start difference. First operand 171 states and 414 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:06,675 INFO L93 Difference]: Finished difference Result 245 states and 536 transitions. [2022-03-15 15:49:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:49:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:06,676 INFO L225 Difference]: With dead ends: 245 [2022-03-15 15:49:06,676 INFO L226 Difference]: Without dead ends: 239 [2022-03-15 15:49:06,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:49:06,676 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:06,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 137 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-15 15:49:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 177. [2022-03-15 15:49:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.4261363636363638) internal successors, (427), 176 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 427 transitions. [2022-03-15 15:49:06,679 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 427 transitions. Word has length 17 [2022-03-15 15:49:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:06,679 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 427 transitions. [2022-03-15 15:49:06,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 427 transitions. [2022-03-15 15:49:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:06,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:06,679 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:06,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:06,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:06,893 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash -890420773, now seen corresponding path program 166 times [2022-03-15 15:49:06,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:06,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154192239] [2022-03-15 15:49:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:07,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154192239] [2022-03-15 15:49:07,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154192239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:07,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021419442] [2022-03-15 15:49:07,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:07,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:07,004 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:07,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 15:49:07,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:07,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:07,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:07,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:07,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:07,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:07,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:07,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:07,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:07,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:07,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021419442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:07,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:07,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:07,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915866674] [2022-03-15 15:49:07,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:07,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:07,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:07,220 INFO L87 Difference]: Start difference. First operand 177 states and 427 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:07,458 INFO L93 Difference]: Finished difference Result 215 states and 490 transitions. [2022-03-15 15:49:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:49:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:07,459 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:49:07,459 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 15:49:07,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:07,459 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:07,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 147 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 15:49:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2022-03-15 15:49:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4285714285714284) internal successors, (408), 168 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 408 transitions. [2022-03-15 15:49:07,461 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 408 transitions. Word has length 17 [2022-03-15 15:49:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:07,461 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 408 transitions. [2022-03-15 15:49:07,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 408 transitions. [2022-03-15 15:49:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:07,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:07,462 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:07,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-15 15:49:07,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-15 15:49:07,678 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash -43899437, now seen corresponding path program 167 times [2022-03-15 15:49:07,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:07,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217824472] [2022-03-15 15:49:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:07,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:07,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217824472] [2022-03-15 15:49:07,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217824472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:07,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795782075] [2022-03-15 15:49:07,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:07,748 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:07,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 15:49:07,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:07,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:07,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:07,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:49:07,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:07,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:49:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:07,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:07,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:49:07,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:07,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:49:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795782075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:07,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:07,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:07,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827509960] [2022-03-15 15:49:07,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:07,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:07,995 INFO L87 Difference]: Start difference. First operand 169 states and 408 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:08,331 INFO L93 Difference]: Finished difference Result 258 states and 551 transitions. [2022-03-15 15:49:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:49:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:08,332 INFO L225 Difference]: With dead ends: 258 [2022-03-15 15:49:08,332 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:49:08,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:49:08,333 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:08,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 183 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:49:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 181. [2022-03-15 15:49:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.422222222222222) internal successors, (436), 180 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 436 transitions. [2022-03-15 15:49:08,335 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 436 transitions. Word has length 17 [2022-03-15 15:49:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:08,335 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 436 transitions. [2022-03-15 15:49:08,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 436 transitions. [2022-03-15 15:49:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:08,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:08,335 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:08,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:08,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-15 15:49:08,549 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2123825827, now seen corresponding path program 168 times [2022-03-15 15:49:08,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:08,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739236836] [2022-03-15 15:49:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:08,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:08,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739236836] [2022-03-15 15:49:08,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739236836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:08,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775849868] [2022-03-15 15:49:08,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:08,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:08,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:08,612 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:08,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 15:49:08,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:08,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:08,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:08,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:49:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:08,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:08,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:08,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:08,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:08,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:08,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775849868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:08,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:08,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:08,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488024873] [2022-03-15 15:49:08,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:08,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:08,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:08,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:08,883 INFO L87 Difference]: Start difference. First operand 181 states and 436 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:09,230 INFO L93 Difference]: Finished difference Result 248 states and 560 transitions. [2022-03-15 15:49:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:49:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:09,230 INFO L225 Difference]: With dead ends: 248 [2022-03-15 15:49:09,230 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 15:49:09,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:09,231 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:09,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 112 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 15:49:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 184. [2022-03-15 15:49:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.4371584699453552) internal successors, (446), 183 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 446 transitions. [2022-03-15 15:49:09,233 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 446 transitions. Word has length 17 [2022-03-15 15:49:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:09,233 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 446 transitions. [2022-03-15 15:49:09,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 446 transitions. [2022-03-15 15:49:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:09,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:09,234 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:09,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:09,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:09,447 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash -948152617, now seen corresponding path program 169 times [2022-03-15 15:49:09,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:09,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809770727] [2022-03-15 15:49:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:09,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:09,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:09,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809770727] [2022-03-15 15:49:09,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809770727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:09,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618609593] [2022-03-15 15:49:09,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:09,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:09,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:09,545 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:09,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 15:49:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:09,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:09,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:09,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:09,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:09,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:09,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:09,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:09,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:09,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618609593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:09,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:09,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:09,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627211399] [2022-03-15 15:49:09,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:09,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:09,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:09,834 INFO L87 Difference]: Start difference. First operand 184 states and 446 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:09,977 INFO L93 Difference]: Finished difference Result 251 states and 558 transitions. [2022-03-15 15:49:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:09,978 INFO L225 Difference]: With dead ends: 251 [2022-03-15 15:49:09,978 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 15:49:09,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:09,978 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:09,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 313 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-15 15:49:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 15:49:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 186. [2022-03-15 15:49:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.454054054054054) internal successors, (454), 185 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 454 transitions. [2022-03-15 15:49:09,981 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 454 transitions. Word has length 17 [2022-03-15 15:49:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:09,981 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 454 transitions. [2022-03-15 15:49:09,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 454 transitions. [2022-03-15 15:49:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:09,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:09,981 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:10,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:10,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:10,197 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1815602265, now seen corresponding path program 170 times [2022-03-15 15:49:10,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:10,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292698621] [2022-03-15 15:49:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:10,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:10,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:10,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292698621] [2022-03-15 15:49:10,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292698621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:10,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932147719] [2022-03-15 15:49:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:10,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:10,264 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:10,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 15:49:10,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:10,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:10,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:10,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:10,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:49:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:10,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:10,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:10,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:10,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:10,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:10,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932147719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:10,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:10,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:10,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334472861] [2022-03-15 15:49:10,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:10,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:10,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:10,527 INFO L87 Difference]: Start difference. First operand 186 states and 454 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:10,649 INFO L93 Difference]: Finished difference Result 240 states and 546 transitions. [2022-03-15 15:49:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:10,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:10,649 INFO L225 Difference]: With dead ends: 240 [2022-03-15 15:49:10,649 INFO L226 Difference]: Without dead ends: 234 [2022-03-15 15:49:10,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:10,650 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:10,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 105 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 307 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:49:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-03-15 15:49:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 188. [2022-03-15 15:49:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.4545454545454546) internal successors, (459), 187 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 459 transitions. [2022-03-15 15:49:10,652 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 459 transitions. Word has length 17 [2022-03-15 15:49:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:10,652 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 459 transitions. [2022-03-15 15:49:10,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 459 transitions. [2022-03-15 15:49:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:10,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:10,652 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:10,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:10,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:10,865 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 411964123, now seen corresponding path program 171 times [2022-03-15 15:49:10,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:10,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294474448] [2022-03-15 15:49:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:10,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:10,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294474448] [2022-03-15 15:49:10,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294474448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:10,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153904665] [2022-03-15 15:49:10,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:10,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:10,948 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:10,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 15:49:10,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:10,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:11,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:11,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:11,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:11,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:49:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:11,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:11,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:11,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:11,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153904665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:11,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:11,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:11,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775473382] [2022-03-15 15:49:11,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:11,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:11,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:11,210 INFO L87 Difference]: Start difference. First operand 188 states and 459 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:11,369 INFO L93 Difference]: Finished difference Result 248 states and 567 transitions. [2022-03-15 15:49:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:11,370 INFO L225 Difference]: With dead ends: 248 [2022-03-15 15:49:11,370 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 15:49:11,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:11,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:11,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 137 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 443 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-03-15 15:49:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 15:49:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 186. [2022-03-15 15:49:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.4486486486486485) internal successors, (453), 185 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 453 transitions. [2022-03-15 15:49:11,373 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 453 transitions. Word has length 17 [2022-03-15 15:49:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:11,373 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 453 transitions. [2022-03-15 15:49:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 453 transitions. [2022-03-15 15:49:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:11,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:11,374 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:11,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:11,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-15 15:49:11,590 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:11,590 INFO L85 PathProgramCache]: Analyzing trace with hash 17041707, now seen corresponding path program 172 times [2022-03-15 15:49:11,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:11,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656693133] [2022-03-15 15:49:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:11,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656693133] [2022-03-15 15:49:11,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656693133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:11,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885419757] [2022-03-15 15:49:11,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:11,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:11,654 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:11,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 15:49:11,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:11,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:11,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:11,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:11,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:11,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:11,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:11,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:11,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885419757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:11,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:11,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:11,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135043261] [2022-03-15 15:49:11,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:11,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:11,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:11,882 INFO L87 Difference]: Start difference. First operand 186 states and 453 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:12,023 INFO L93 Difference]: Finished difference Result 232 states and 526 transitions. [2022-03-15 15:49:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:12,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:12,024 INFO L225 Difference]: With dead ends: 232 [2022-03-15 15:49:12,024 INFO L226 Difference]: Without dead ends: 230 [2022-03-15 15:49:12,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:12,024 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:12,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 128 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 321 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-03-15 15:49:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-15 15:49:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 186. [2022-03-15 15:49:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.4486486486486485) internal successors, (453), 185 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 453 transitions. [2022-03-15 15:49:12,032 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 453 transitions. Word has length 17 [2022-03-15 15:49:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:12,032 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 453 transitions. [2022-03-15 15:49:12,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 453 transitions. [2022-03-15 15:49:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:12,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:12,033 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:12,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:12,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:12,248 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1734206637, now seen corresponding path program 173 times [2022-03-15 15:49:12,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:12,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635800946] [2022-03-15 15:49:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:12,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:12,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:12,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635800946] [2022-03-15 15:49:12,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635800946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:12,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039449111] [2022-03-15 15:49:12,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:12,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:12,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:12,352 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:12,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 15:49:12,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:12,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:12,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:12,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:12,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:12,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:12,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:12,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:12,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:12,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:12,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:49:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:12,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039449111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:12,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:12,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:12,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570407653] [2022-03-15 15:49:12,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:12,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:12,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:12,582 INFO L87 Difference]: Start difference. First operand 186 states and 453 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:12,665 INFO L93 Difference]: Finished difference Result 219 states and 513 transitions. [2022-03-15 15:49:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:12,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:12,666 INFO L225 Difference]: With dead ends: 219 [2022-03-15 15:49:12,666 INFO L226 Difference]: Without dead ends: 219 [2022-03-15 15:49:12,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:12,666 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:12,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 66 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-03-15 15:49:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-15 15:49:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 183. [2022-03-15 15:49:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.4395604395604398) internal successors, (444), 182 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 444 transitions. [2022-03-15 15:49:12,668 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 444 transitions. Word has length 17 [2022-03-15 15:49:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:12,669 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 444 transitions. [2022-03-15 15:49:12,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 444 transitions. [2022-03-15 15:49:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:12,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:12,669 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:12,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:12,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:12,870 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash -612707029, now seen corresponding path program 174 times [2022-03-15 15:49:12,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:12,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409924630] [2022-03-15 15:49:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:12,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:12,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409924630] [2022-03-15 15:49:12,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409924630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:12,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399209869] [2022-03-15 15:49:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:12,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:12,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:12,951 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:12,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 15:49:12,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:49:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:13,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:13,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:13,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:13,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:13,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:13,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:13,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:49:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:13,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399209869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:13,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:13,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:13,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415968118] [2022-03-15 15:49:13,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:13,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:13,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:13,196 INFO L87 Difference]: Start difference. First operand 183 states and 444 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:13,341 INFO L93 Difference]: Finished difference Result 246 states and 560 transitions. [2022-03-15 15:49:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:13,342 INFO L225 Difference]: With dead ends: 246 [2022-03-15 15:49:13,342 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 15:49:13,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:13,342 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:13,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 155 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 15:49:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 184. [2022-03-15 15:49:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.448087431693989) internal successors, (448), 183 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 448 transitions. [2022-03-15 15:49:13,345 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 448 transitions. Word has length 17 [2022-03-15 15:49:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:13,345 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 448 transitions. [2022-03-15 15:49:13,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 448 transitions. [2022-03-15 15:49:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:13,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:13,345 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:13,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:13,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-15 15:49:13,550 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1005337729, now seen corresponding path program 175 times [2022-03-15 15:49:13,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:13,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893176252] [2022-03-15 15:49:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:13,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:13,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:13,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893176252] [2022-03-15 15:49:13,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893176252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:13,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31855334] [2022-03-15 15:49:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:13,629 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:13,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 15:49:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:13,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:13,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:13,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:13,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:13,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:13,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:13,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:13,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:13,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:13,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31855334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:13,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:13,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:13,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922673284] [2022-03-15 15:49:13,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:13,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:13,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:13,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:13,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:13,912 INFO L87 Difference]: Start difference. First operand 184 states and 448 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:14,178 INFO L93 Difference]: Finished difference Result 274 states and 615 transitions. [2022-03-15 15:49:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:49:14,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:14,179 INFO L225 Difference]: With dead ends: 274 [2022-03-15 15:49:14,179 INFO L226 Difference]: Without dead ends: 274 [2022-03-15 15:49:14,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:14,179 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:14,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 226 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-15 15:49:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 184. [2022-03-15 15:49:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.453551912568306) internal successors, (449), 183 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 449 transitions. [2022-03-15 15:49:14,182 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 449 transitions. Word has length 17 [2022-03-15 15:49:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:14,182 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 449 transitions. [2022-03-15 15:49:14,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 449 transitions. [2022-03-15 15:49:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:14,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:14,182 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:14,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:14,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:14,391 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:14,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1398761049, now seen corresponding path program 176 times [2022-03-15 15:49:14,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:14,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419099225] [2022-03-15 15:49:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:14,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:14,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419099225] [2022-03-15 15:49:14,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419099225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:14,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054757697] [2022-03-15 15:49:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:14,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:14,479 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:14,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 15:49:14,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:14,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:14,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:14,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:49:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:14,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:14,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:14,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:14,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:14,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:14,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054757697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:14,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:14,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:14,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436165742] [2022-03-15 15:49:14,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:14,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:14,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:14,766 INFO L87 Difference]: Start difference. First operand 184 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:14,995 INFO L93 Difference]: Finished difference Result 269 states and 588 transitions. [2022-03-15 15:49:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:49:14,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:14,996 INFO L225 Difference]: With dead ends: 269 [2022-03-15 15:49:14,996 INFO L226 Difference]: Without dead ends: 263 [2022-03-15 15:49:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:14,996 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 108 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-15 15:49:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 186. [2022-03-15 15:49:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.454054054054054) internal successors, (454), 185 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 454 transitions. [2022-03-15 15:49:14,999 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 454 transitions. Word has length 17 [2022-03-15 15:49:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:14,999 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 454 transitions. [2022-03-15 15:49:14,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 454 transitions. [2022-03-15 15:49:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:14,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:14,999 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:15,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:15,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:15,207 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash 828805339, now seen corresponding path program 177 times [2022-03-15 15:49:15,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:15,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071345084] [2022-03-15 15:49:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:15,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:15,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071345084] [2022-03-15 15:49:15,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071345084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:15,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556044777] [2022-03-15 15:49:15,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:15,295 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:15,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 15:49:15,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:49:15,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:15,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:15,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:15,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:15,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:15,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:15,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:15,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:15,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556044777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:15,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:15,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:15,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036149510] [2022-03-15 15:49:15,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:15,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:15,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:15,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:15,525 INFO L87 Difference]: Start difference. First operand 186 states and 454 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:15,703 INFO L93 Difference]: Finished difference Result 240 states and 544 transitions. [2022-03-15 15:49:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:15,704 INFO L225 Difference]: With dead ends: 240 [2022-03-15 15:49:15,704 INFO L226 Difference]: Without dead ends: 240 [2022-03-15 15:49:15,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:15,704 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:15,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 126 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-15 15:49:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 182. [2022-03-15 15:49:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.447513812154696) internal successors, (443), 181 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 443 transitions. [2022-03-15 15:49:15,706 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 443 transitions. Word has length 17 [2022-03-15 15:49:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:15,707 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 443 transitions. [2022-03-15 15:49:15,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 443 transitions. [2022-03-15 15:49:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:15,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:15,707 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:15,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:15,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:15,911 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1656871775, now seen corresponding path program 178 times [2022-03-15 15:49:15,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:15,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155787160] [2022-03-15 15:49:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:16,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155787160] [2022-03-15 15:49:16,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155787160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:16,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121700554] [2022-03-15 15:49:16,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:16,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:16,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:16,011 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:16,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:16,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 15:49:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:16,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:16,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:16,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:16,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:16,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:16,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:16,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121700554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:16,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:16,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:16,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972665526] [2022-03-15 15:49:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:16,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:16,219 INFO L87 Difference]: Start difference. First operand 182 states and 443 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:16,433 INFO L93 Difference]: Finished difference Result 244 states and 555 transitions. [2022-03-15 15:49:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:49:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:16,433 INFO L225 Difference]: With dead ends: 244 [2022-03-15 15:49:16,433 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 15:49:16,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:49:16,434 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:16,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 124 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 366 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-03-15 15:49:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 15:49:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 184. [2022-03-15 15:49:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.4644808743169397) internal successors, (451), 183 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 451 transitions. [2022-03-15 15:49:16,436 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 451 transitions. Word has length 17 [2022-03-15 15:49:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:16,436 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 451 transitions. [2022-03-15 15:49:16,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 451 transitions. [2022-03-15 15:49:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:16,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:16,436 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:16,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:16,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:16,637 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1672901197, now seen corresponding path program 179 times [2022-03-15 15:49:16,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:16,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744628630] [2022-03-15 15:49:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:16,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744628630] [2022-03-15 15:49:16,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744628630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:16,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079812489] [2022-03-15 15:49:16,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:16,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:16,712 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:16,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 15:49:16,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:16,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:16,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:16,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:16,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:16,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:16,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:16,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:16,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:16,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079812489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:16,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:16,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:16,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480201758] [2022-03-15 15:49:16,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:16,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:16,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:16,911 INFO L87 Difference]: Start difference. First operand 184 states and 451 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:17,160 INFO L93 Difference]: Finished difference Result 281 states and 603 transitions. [2022-03-15 15:49:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:49:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:17,175 INFO L225 Difference]: With dead ends: 281 [2022-03-15 15:49:17,175 INFO L226 Difference]: Without dead ends: 277 [2022-03-15 15:49:17,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:17,176 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:17,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 154 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 327 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:49:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-15 15:49:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 184. [2022-03-15 15:49:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.453551912568306) internal successors, (449), 183 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 449 transitions. [2022-03-15 15:49:17,178 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 449 transitions. Word has length 17 [2022-03-15 15:49:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:17,179 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 449 transitions. [2022-03-15 15:49:17,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 449 transitions. [2022-03-15 15:49:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:17,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:17,179 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:17,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:17,379 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash 870817755, now seen corresponding path program 180 times [2022-03-15 15:49:17,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:17,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125075760] [2022-03-15 15:49:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:17,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:17,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125075760] [2022-03-15 15:49:17,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125075760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:17,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976807937] [2022-03-15 15:49:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:17,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:17,444 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:17,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 15:49:17,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:49:17,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:17,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:17,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:17,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:49:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:17,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:17,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:17,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:17,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976807937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:17,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:17,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:17,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571920653] [2022-03-15 15:49:17,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:17,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:17,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:17,733 INFO L87 Difference]: Start difference. First operand 184 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:17,930 INFO L93 Difference]: Finished difference Result 233 states and 538 transitions. [2022-03-15 15:49:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:17,931 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:49:17,931 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 15:49:17,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:17,931 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:17,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 191 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 466 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-03-15 15:49:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 15:49:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2022-03-15 15:49:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.467032967032967) internal successors, (449), 182 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 449 transitions. [2022-03-15 15:49:17,933 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 449 transitions. Word has length 17 [2022-03-15 15:49:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:17,934 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 449 transitions. [2022-03-15 15:49:17,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 449 transitions. [2022-03-15 15:49:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:17,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:17,934 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:17,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:18,134 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2086836297, now seen corresponding path program 181 times [2022-03-15 15:49:18,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:18,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640433141] [2022-03-15 15:49:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:18,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:18,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640433141] [2022-03-15 15:49:18,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640433141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:18,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261042451] [2022-03-15 15:49:18,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:18,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:18,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:18,220 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:18,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 15:49:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:18,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:18,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:18,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:18,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:18,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:18,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:49:18,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:18,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:49:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261042451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:18,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:18,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:18,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289060568] [2022-03-15 15:49:18,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:18,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:18,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:18,517 INFO L87 Difference]: Start difference. First operand 183 states and 449 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:18,654 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2022-03-15 15:49:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:49:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:18,654 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:49:18,654 INFO L226 Difference]: Without dead ends: 194 [2022-03-15 15:49:18,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:18,654 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:18,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 81 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-03-15 15:49:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-15 15:49:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 183. [2022-03-15 15:49:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.456043956043956) internal successors, (447), 182 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 447 transitions. [2022-03-15 15:49:18,657 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 447 transitions. Word has length 17 [2022-03-15 15:49:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 447 transitions. [2022-03-15 15:49:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 447 transitions. [2022-03-15 15:49:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:18,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:18,657 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:18,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:18,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2022-03-15 15:49:18,858 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash 771073495, now seen corresponding path program 182 times [2022-03-15 15:49:18,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:18,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981465673] [2022-03-15 15:49:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:18,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981465673] [2022-03-15 15:49:18,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981465673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:18,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365694621] [2022-03-15 15:49:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:18,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:18,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:18,971 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:18,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 15:49:18,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:18,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:18,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:19,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:19,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:19,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:19,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:19,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:19,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:19,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365694621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:19,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:19,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:19,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397718119] [2022-03-15 15:49:19,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:19,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:19,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:19,335 INFO L87 Difference]: Start difference. First operand 183 states and 447 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:19,610 INFO L93 Difference]: Finished difference Result 256 states and 572 transitions. [2022-03-15 15:49:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:49:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:19,611 INFO L225 Difference]: With dead ends: 256 [2022-03-15 15:49:19,611 INFO L226 Difference]: Without dead ends: 256 [2022-03-15 15:49:19,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:19,611 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:19,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 152 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 327 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-03-15 15:49:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-15 15:49:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 185. [2022-03-15 15:49:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.472826086956522) internal successors, (455), 184 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 455 transitions. [2022-03-15 15:49:19,613 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 455 transitions. Word has length 17 [2022-03-15 15:49:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:19,613 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 455 transitions. [2022-03-15 15:49:19,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 455 transitions. [2022-03-15 15:49:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:19,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:19,614 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:19,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:19,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:19,814 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:19,814 INFO L85 PathProgramCache]: Analyzing trace with hash -96376153, now seen corresponding path program 183 times [2022-03-15 15:49:19,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:19,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929914895] [2022-03-15 15:49:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:19,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:19,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929914895] [2022-03-15 15:49:19,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929914895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:19,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275566653] [2022-03-15 15:49:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:19,892 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 15:49:19,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:49:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:20,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:20,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:20,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:20,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:49:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:20,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:20,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:20,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:20,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275566653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:20,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:20,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:20,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084361052] [2022-03-15 15:49:20,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:20,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:20,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:20,151 INFO L87 Difference]: Start difference. First operand 185 states and 455 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:20,389 INFO L93 Difference]: Finished difference Result 232 states and 531 transitions. [2022-03-15 15:49:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:20,389 INFO L225 Difference]: With dead ends: 232 [2022-03-15 15:49:20,389 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 15:49:20,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:49:20,390 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:20,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 113 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 225 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-15 15:49:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 15:49:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 186. [2022-03-15 15:49:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.4702702702702704) internal successors, (457), 185 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 457 transitions. [2022-03-15 15:49:20,392 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 457 transitions. Word has length 17 [2022-03-15 15:49:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 457 transitions. [2022-03-15 15:49:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 457 transitions. [2022-03-15 15:49:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:20,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:20,392 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:20,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:20,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-15 15:49:20,594 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2131190235, now seen corresponding path program 184 times [2022-03-15 15:49:20,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:20,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129538980] [2022-03-15 15:49:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:20,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:20,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129538980] [2022-03-15 15:49:20,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129538980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:20,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930298034] [2022-03-15 15:49:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:20,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:20,678 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:20,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 15:49:20,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:20,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:20,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:20,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:20,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:20,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:20,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:20,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:20,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:20,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930298034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:21,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:21,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:21,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667048381] [2022-03-15 15:49:21,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:21,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:21,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:21,041 INFO L87 Difference]: Start difference. First operand 186 states and 457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:21,480 INFO L93 Difference]: Finished difference Result 257 states and 578 transitions. [2022-03-15 15:49:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:49:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:21,481 INFO L225 Difference]: With dead ends: 257 [2022-03-15 15:49:21,481 INFO L226 Difference]: Without dead ends: 257 [2022-03-15 15:49:21,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:49:21,481 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:21,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 170 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 367 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-03-15 15:49:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-15 15:49:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 184. [2022-03-15 15:49:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.453551912568306) internal successors, (449), 183 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 449 transitions. [2022-03-15 15:49:21,485 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 449 transitions. Word has length 17 [2022-03-15 15:49:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:21,485 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 449 transitions. [2022-03-15 15:49:21,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 449 transitions. [2022-03-15 15:49:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:21,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:21,485 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:21,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:21,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 15:49:21,692 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1736267819, now seen corresponding path program 185 times [2022-03-15 15:49:21,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:21,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605775036] [2022-03-15 15:49:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:21,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605775036] [2022-03-15 15:49:21,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605775036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:21,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767943066] [2022-03-15 15:49:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:21,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:21,804 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:21,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 15:49:21,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:21,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:21,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:21,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:21,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:21,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:22,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:22,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:22,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:22,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767943066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:22,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:22,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:22,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180238086] [2022-03-15 15:49:22,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:22,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:22,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:22,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:22,084 INFO L87 Difference]: Start difference. First operand 184 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:22,433 INFO L93 Difference]: Finished difference Result 240 states and 543 transitions. [2022-03-15 15:49:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:22,433 INFO L225 Difference]: With dead ends: 240 [2022-03-15 15:49:22,434 INFO L226 Difference]: Without dead ends: 238 [2022-03-15 15:49:22,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:22,434 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:22,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 296 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2022-03-15 15:49:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-15 15:49:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2022-03-15 15:49:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.453551912568306) internal successors, (449), 183 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 449 transitions. [2022-03-15 15:49:22,436 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 449 transitions. Word has length 17 [2022-03-15 15:49:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:22,436 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 449 transitions. [2022-03-15 15:49:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 449 transitions. [2022-03-15 15:49:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:22,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:22,437 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:22,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:22,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:22,637 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash -14980525, now seen corresponding path program 186 times [2022-03-15 15:49:22,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:22,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324580423] [2022-03-15 15:49:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:22,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324580423] [2022-03-15 15:49:22,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324580423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:22,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041876945] [2022-03-15 15:49:22,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:22,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:22,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:22,694 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:22,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 15:49:22,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:22,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:22,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:22,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:22,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:22,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:22,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:22,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:22,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:22,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:22,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041876945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:22,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:22,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:22,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707225101] [2022-03-15 15:49:22,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:22,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:22,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:22,956 INFO L87 Difference]: Start difference. First operand 184 states and 449 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:23,088 INFO L93 Difference]: Finished difference Result 199 states and 485 transitions. [2022-03-15 15:49:23,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:23,088 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:23,089 INFO L225 Difference]: With dead ends: 199 [2022-03-15 15:49:23,089 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 15:49:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:23,089 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:23,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:49:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 15:49:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-03-15 15:49:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.454054054054054) internal successors, (454), 185 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 454 transitions. [2022-03-15 15:49:23,091 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 454 transitions. Word has length 17 [2022-03-15 15:49:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 454 transitions. [2022-03-15 15:49:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 454 transitions. [2022-03-15 15:49:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:23,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:23,091 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:23,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-15 15:49:23,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:23,307 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1521668605, now seen corresponding path program 187 times [2022-03-15 15:49:23,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:23,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930713516] [2022-03-15 15:49:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:23,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930713516] [2022-03-15 15:49:23,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930713516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:23,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141768719] [2022-03-15 15:49:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:23,377 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:23,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 15:49:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:23,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:23,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:23,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:23,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:23,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:23,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:23,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:23,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141768719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:23,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:23,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:23,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525638437] [2022-03-15 15:49:23,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:23,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:23,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:23,673 INFO L87 Difference]: Start difference. First operand 186 states and 454 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:23,840 INFO L93 Difference]: Finished difference Result 211 states and 503 transitions. [2022-03-15 15:49:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:23,841 INFO L225 Difference]: With dead ends: 211 [2022-03-15 15:49:23,841 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:49:23,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:23,841 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:23,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-03-15 15:49:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:49:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2022-03-15 15:49:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.448087431693989) internal successors, (448), 183 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 448 transitions. [2022-03-15 15:49:23,843 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 448 transitions. Word has length 17 [2022-03-15 15:49:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:23,843 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 448 transitions. [2022-03-15 15:49:23,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 448 transitions. [2022-03-15 15:49:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:23,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:23,844 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:23,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:24,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2022-03-15 15:49:24,059 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash 950213799, now seen corresponding path program 188 times [2022-03-15 15:49:24,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:24,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599996935] [2022-03-15 15:49:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:24,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:24,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599996935] [2022-03-15 15:49:24,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599996935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:24,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420636881] [2022-03-15 15:49:24,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:24,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:24,128 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:24,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 15:49:24,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:24,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:24,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:24,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:24,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:49:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:24,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:24,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:24,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:24,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420636881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:24,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:24,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:24,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379442910] [2022-03-15 15:49:24,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:24,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:24,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:24,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:24,463 INFO L87 Difference]: Start difference. First operand 184 states and 448 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:24,630 INFO L93 Difference]: Finished difference Result 224 states and 521 transitions. [2022-03-15 15:49:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:49:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:24,631 INFO L225 Difference]: With dead ends: 224 [2022-03-15 15:49:24,631 INFO L226 Difference]: Without dead ends: 224 [2022-03-15 15:49:24,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:24,631 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:24,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 83 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 190 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-03-15 15:49:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-15 15:49:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 181. [2022-03-15 15:49:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.438888888888889) internal successors, (439), 180 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 439 transitions. [2022-03-15 15:49:24,633 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 439 transitions. Word has length 17 [2022-03-15 15:49:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:24,633 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 439 transitions. [2022-03-15 15:49:24,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 439 transitions. [2022-03-15 15:49:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:24,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:24,634 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:24,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-15 15:49:24,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:24,834 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1201038017, now seen corresponding path program 189 times [2022-03-15 15:49:24,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:24,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132302639] [2022-03-15 15:49:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:24,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132302639] [2022-03-15 15:49:24,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132302639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:24,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96794505] [2022-03-15 15:49:24,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:24,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:24,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:24,945 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:24,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 15:49:24,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:25,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:25,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:25,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:25,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:25,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:49:25,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:25,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:49:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96794505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:25,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:25,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:25,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265359331] [2022-03-15 15:49:25,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:25,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:25,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:25,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:25,309 INFO L87 Difference]: Start difference. First operand 181 states and 439 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:25,515 INFO L93 Difference]: Finished difference Result 196 states and 465 transitions. [2022-03-15 15:49:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:25,515 INFO L225 Difference]: With dead ends: 196 [2022-03-15 15:49:25,515 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 15:49:25,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:25,516 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:25,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 73 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-03-15 15:49:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 15:49:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2022-03-15 15:49:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.433333333333333) internal successors, (438), 180 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 438 transitions. [2022-03-15 15:49:25,518 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 438 transitions. Word has length 17 [2022-03-15 15:49:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:25,518 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 438 transitions. [2022-03-15 15:49:25,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 438 transitions. [2022-03-15 15:49:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:25,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:25,518 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:25,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-15 15:49:25,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:25,719 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2121764645, now seen corresponding path program 190 times [2022-03-15 15:49:25,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:25,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269247378] [2022-03-15 15:49:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:25,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:25,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269247378] [2022-03-15 15:49:25,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269247378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:25,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820473683] [2022-03-15 15:49:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:25,803 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:25,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 15:49:25,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:25,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:25,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:25,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:26,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:26,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:26,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:26,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820473683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:26,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:26,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:26,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472830246] [2022-03-15 15:49:26,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:26,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:26,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:26,117 INFO L87 Difference]: Start difference. First operand 181 states and 438 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:26,179 INFO L93 Difference]: Finished difference Result 203 states and 487 transitions. [2022-03-15 15:49:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:49:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:26,180 INFO L225 Difference]: With dead ends: 203 [2022-03-15 15:49:26,180 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 15:49:26,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:26,180 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:26,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 71 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:49:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 15:49:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 183. [2022-03-15 15:49:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.4395604395604398) internal successors, (444), 182 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 444 transitions. [2022-03-15 15:49:26,182 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 444 transitions. Word has length 17 [2022-03-15 15:49:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:26,182 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 444 transitions. [2022-03-15 15:49:26,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 444 transitions. [2022-03-15 15:49:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:26,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:26,183 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:26,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:26,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:26,387 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1156570321, now seen corresponding path program 191 times [2022-03-15 15:49:26,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:26,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107529245] [2022-03-15 15:49:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:26,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107529245] [2022-03-15 15:49:26,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107529245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:26,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790609762] [2022-03-15 15:49:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:26,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:26,465 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:26,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 15:49:26,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:26,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:26,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:26,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:26,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:26,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:26,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:26,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790609762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:26,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:26,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:49:26,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962359371] [2022-03-15 15:49:26,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:26,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:49:26,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:49:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:26,755 INFO L87 Difference]: Start difference. First operand 183 states and 444 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:26,841 INFO L93 Difference]: Finished difference Result 213 states and 502 transitions. [2022-03-15 15:49:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:49:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:26,842 INFO L225 Difference]: With dead ends: 213 [2022-03-15 15:49:26,842 INFO L226 Difference]: Without dead ends: 213 [2022-03-15 15:49:26,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:26,842 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 94 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-03-15 15:49:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-15 15:49:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 183. [2022-03-15 15:49:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.4395604395604398) internal successors, (444), 182 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 444 transitions. [2022-03-15 15:49:26,844 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 444 transitions. Word has length 17 [2022-03-15 15:49:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:26,844 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 444 transitions. [2022-03-15 15:49:26,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 444 transitions. [2022-03-15 15:49:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:26,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:26,845 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:26,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:27,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:27,045 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1691800123, now seen corresponding path program 192 times [2022-03-15 15:49:27,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:27,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800660210] [2022-03-15 15:49:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:27,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800660210] [2022-03-15 15:49:27,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800660210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:27,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816635791] [2022-03-15 15:49:27,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:27,109 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:27,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 15:49:27,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:27,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:27,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:27,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:27,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:27,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:49:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:27,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:27,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:27,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:27,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816635791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:27,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:27,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:49:27,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756814439] [2022-03-15 15:49:27,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:27,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:27,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:27,373 INFO L87 Difference]: Start difference. First operand 183 states and 444 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:27,433 INFO L93 Difference]: Finished difference Result 215 states and 502 transitions. [2022-03-15 15:49:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:49:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:27,433 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:49:27,433 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 15:49:27,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:27,433 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:27,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 82 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-03-15 15:49:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 15:49:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2022-03-15 15:49:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.4395604395604398) internal successors, (444), 182 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 444 transitions. [2022-03-15 15:49:27,451 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 444 transitions. Word has length 17 [2022-03-15 15:49:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:27,451 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 444 transitions. [2022-03-15 15:49:27,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 444 transitions. [2022-03-15 15:49:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:27,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:27,452 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:27,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-15 15:49:27,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:27,667 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1788783339, now seen corresponding path program 193 times [2022-03-15 15:49:27,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:27,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215393737] [2022-03-15 15:49:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:27,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:27,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215393737] [2022-03-15 15:49:27,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215393737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:27,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227342657] [2022-03-15 15:49:27,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:27,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:27,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:27,736 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:27,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 15:49:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:27,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:27,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:27,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:27,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:27,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:27,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:49:27,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:27,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:49:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227342657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:27,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:27,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:27,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280090981] [2022-03-15 15:49:27,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:27,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:27,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:27,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:27,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:27,991 INFO L87 Difference]: Start difference. First operand 183 states and 444 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:28,106 INFO L93 Difference]: Finished difference Result 201 states and 473 transitions. [2022-03-15 15:49:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:28,107 INFO L225 Difference]: With dead ends: 201 [2022-03-15 15:49:28,107 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 15:49:28,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:28,107 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:28,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:49:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 15:49:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2022-03-15 15:49:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.4285714285714284) internal successors, (442), 182 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 442 transitions. [2022-03-15 15:49:28,109 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 442 transitions. Word has length 17 [2022-03-15 15:49:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:28,109 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 442 transitions. [2022-03-15 15:49:28,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 442 transitions. [2022-03-15 15:49:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:28,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:28,110 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:28,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:28,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:28,310 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1673485119, now seen corresponding path program 194 times [2022-03-15 15:49:28,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:28,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872103499] [2022-03-15 15:49:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:28,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:28,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872103499] [2022-03-15 15:49:28,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872103499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:28,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327785345] [2022-03-15 15:49:28,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:28,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:28,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:28,389 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:28,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 15:49:28,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:28,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:28,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:28,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:28,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:28,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:28,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:28,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:28,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:28,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327785345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:28,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:28,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:28,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933938805] [2022-03-15 15:49:28,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:28,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:28,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:28,675 INFO L87 Difference]: Start difference. First operand 183 states and 442 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:28,929 INFO L93 Difference]: Finished difference Result 278 states and 621 transitions. [2022-03-15 15:49:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:49:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:28,929 INFO L225 Difference]: With dead ends: 278 [2022-03-15 15:49:28,929 INFO L226 Difference]: Without dead ends: 278 [2022-03-15 15:49:28,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:28,930 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:28,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 197 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-15 15:49:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 184. [2022-03-15 15:49:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.4371584699453552) internal successors, (446), 183 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 446 transitions. [2022-03-15 15:49:28,932 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 446 transitions. Word has length 17 [2022-03-15 15:49:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:28,932 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 446 transitions. [2022-03-15 15:49:28,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 446 transitions. [2022-03-15 15:49:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:28,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:28,933 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:28,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:29,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 15:49:29,143 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1592089491, now seen corresponding path program 195 times [2022-03-15 15:49:29,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:29,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798860813] [2022-03-15 15:49:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:29,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798860813] [2022-03-15 15:49:29,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798860813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:29,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553829644] [2022-03-15 15:49:29,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:29,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:29,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:29,233 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:29,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 15:49:29,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:49:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:29,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:29,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:29,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:29,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:29,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:29,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:29,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:29,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553829644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:29,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:29,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:29,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669374392] [2022-03-15 15:49:29,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:29,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:29,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:29,509 INFO L87 Difference]: Start difference. First operand 184 states and 446 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:29,962 INFO L93 Difference]: Finished difference Result 305 states and 667 transitions. [2022-03-15 15:49:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:49:29,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:29,963 INFO L225 Difference]: With dead ends: 305 [2022-03-15 15:49:29,963 INFO L226 Difference]: Without dead ends: 305 [2022-03-15 15:49:29,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:49:29,963 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:29,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 241 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:49:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-15 15:49:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 185. [2022-03-15 15:49:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.4456521739130435) internal successors, (450), 184 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 450 transitions. [2022-03-15 15:49:29,965 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 450 transitions. Word has length 17 [2022-03-15 15:49:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:29,966 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 450 transitions. [2022-03-15 15:49:29,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 450 transitions. [2022-03-15 15:49:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:29,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:29,966 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:29,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 15:49:30,175 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:30,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1835428157, now seen corresponding path program 196 times [2022-03-15 15:49:30,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:30,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695340570] [2022-03-15 15:49:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:30,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:30,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695340570] [2022-03-15 15:49:30,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695340570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:30,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731084799] [2022-03-15 15:49:30,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:30,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:30,255 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:30,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 15:49:30,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:30,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:30,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:30,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:30,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:30,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:30,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:30,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:30,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:30,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731084799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:30,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:30,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:30,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957087734] [2022-03-15 15:49:30,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:30,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:30,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:30,502 INFO L87 Difference]: Start difference. First operand 185 states and 450 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:30,831 INFO L93 Difference]: Finished difference Result 297 states and 642 transitions. [2022-03-15 15:49:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:49:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:30,832 INFO L225 Difference]: With dead ends: 297 [2022-03-15 15:49:30,832 INFO L226 Difference]: Without dead ends: 291 [2022-03-15 15:49:30,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:30,832 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:30,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 136 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-15 15:49:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 186. [2022-03-15 15:49:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.443243243243243) internal successors, (452), 185 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 452 transitions. [2022-03-15 15:49:30,834 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 452 transitions. Word has length 17 [2022-03-15 15:49:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:30,835 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 452 transitions. [2022-03-15 15:49:30,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 452 transitions. [2022-03-15 15:49:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:30,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:30,835 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:30,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:31,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 15:49:31,043 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:31,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash -231972751, now seen corresponding path program 197 times [2022-03-15 15:49:31,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:31,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54485292] [2022-03-15 15:49:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:31,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:31,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54485292] [2022-03-15 15:49:31,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54485292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:31,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722723938] [2022-03-15 15:49:31,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:31,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:31,136 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:31,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 15:49:31,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:49:31,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:31,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:31,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:31,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:31,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:31,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:31,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722723938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:31,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:31,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:31,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027524568] [2022-03-15 15:49:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:31,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:31,409 INFO L87 Difference]: Start difference. First operand 186 states and 452 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:31,738 INFO L93 Difference]: Finished difference Result 277 states and 608 transitions. [2022-03-15 15:49:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:49:31,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:31,738 INFO L225 Difference]: With dead ends: 277 [2022-03-15 15:49:31,738 INFO L226 Difference]: Without dead ends: 277 [2022-03-15 15:49:31,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:49:31,739 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:31,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 221 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-15 15:49:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 182. [2022-03-15 15:49:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.430939226519337) internal successors, (440), 181 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 440 transitions. [2022-03-15 15:49:31,741 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 440 transitions. Word has length 17 [2022-03-15 15:49:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:31,741 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 440 transitions. [2022-03-15 15:49:31,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 440 transitions. [2022-03-15 15:49:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:31,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:31,741 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:31,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:31,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 15:49:31,951 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:31,951 INFO L85 PathProgramCache]: Analyzing trace with hash -626895167, now seen corresponding path program 198 times [2022-03-15 15:49:31,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:31,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205753213] [2022-03-15 15:49:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:32,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205753213] [2022-03-15 15:49:32,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205753213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:32,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650288090] [2022-03-15 15:49:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:32,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:32,024 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:32,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 15:49:32,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:32,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:32,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:32,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:32,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:32,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:32,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:32,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:32,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:32,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:32,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650288090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:32,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:32,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:32,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327166613] [2022-03-15 15:49:32,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:32,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:32,283 INFO L87 Difference]: Start difference. First operand 182 states and 440 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:32,528 INFO L93 Difference]: Finished difference Result 271 states and 599 transitions. [2022-03-15 15:49:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:49:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:32,528 INFO L225 Difference]: With dead ends: 271 [2022-03-15 15:49:32,529 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 15:49:32,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:32,529 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:32,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 162 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 15:49:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 183. [2022-03-15 15:49:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.434065934065934) internal successors, (443), 182 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 443 transitions. [2022-03-15 15:49:32,531 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 443 transitions. Word has length 17 [2022-03-15 15:49:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:32,531 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 443 transitions. [2022-03-15 15:49:32,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 443 transitions. [2022-03-15 15:49:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:32,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:32,532 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:32,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-15 15:49:32,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:32,732 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 596093685, now seen corresponding path program 199 times [2022-03-15 15:49:32,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:32,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825037092] [2022-03-15 15:49:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:32,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825037092] [2022-03-15 15:49:32,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825037092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:32,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146452461] [2022-03-15 15:49:32,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:32,830 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:32,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 15:49:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:32,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:32,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:33,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:33,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:33,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:33,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146452461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:33,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:33,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:33,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986465564] [2022-03-15 15:49:33,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:33,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:33,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:33,087 INFO L87 Difference]: Start difference. First operand 183 states and 443 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:33,470 INFO L93 Difference]: Finished difference Result 273 states and 594 transitions. [2022-03-15 15:49:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:49:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:33,470 INFO L225 Difference]: With dead ends: 273 [2022-03-15 15:49:33,470 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 15:49:33,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:49:33,471 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:33,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 115 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 351 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-03-15 15:49:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 15:49:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 181. [2022-03-15 15:49:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.4166666666666665) internal successors, (435), 180 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 435 transitions. [2022-03-15 15:49:33,473 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 435 transitions. Word has length 17 [2022-03-15 15:49:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:33,473 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 435 transitions. [2022-03-15 15:49:33,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 435 transitions. [2022-03-15 15:49:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:33,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:33,473 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:33,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:33,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-15 15:49:33,682 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1561288009, now seen corresponding path program 200 times [2022-03-15 15:49:33,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:33,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894356624] [2022-03-15 15:49:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:33,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894356624] [2022-03-15 15:49:33,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894356624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:33,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583886020] [2022-03-15 15:49:33,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:33,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:33,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:33,771 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:33,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 15:49:33,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:33,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:33,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:33,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:33,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:33,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:33,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:33,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:33,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:49:33,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:33,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:49:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583886020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:34,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:34,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:34,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254279756] [2022-03-15 15:49:34,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:34,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:34,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:34,048 INFO L87 Difference]: Start difference. First operand 181 states and 435 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:34,488 INFO L93 Difference]: Finished difference Result 295 states and 619 transitions. [2022-03-15 15:49:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:49:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:34,489 INFO L225 Difference]: With dead ends: 295 [2022-03-15 15:49:34,489 INFO L226 Difference]: Without dead ends: 291 [2022-03-15 15:49:34,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:34,490 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:34,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 170 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 379 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-03-15 15:49:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-15 15:49:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 178. [2022-03-15 15:49:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.384180790960452) internal successors, (422), 177 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 422 transitions. [2022-03-15 15:49:34,492 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 422 transitions. Word has length 17 [2022-03-15 15:49:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:34,492 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 422 transitions. [2022-03-15 15:49:34,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 422 transitions. [2022-03-15 15:49:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:34,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:34,493 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:34,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-15 15:49:34,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-15 15:49:34,693 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash -189960335, now seen corresponding path program 201 times [2022-03-15 15:49:34,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:34,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567724892] [2022-03-15 15:49:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:34,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:34,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567724892] [2022-03-15 15:49:34,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567724892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:34,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120417288] [2022-03-15 15:49:34,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:34,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:34,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:34,770 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:34,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 15:49:34,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:49:34,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:34,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:34,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:34,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:34,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:34,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:34,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:34,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:49:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120417288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:34,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:34,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:34,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842773448] [2022-03-15 15:49:34,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:34,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:34,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:35,000 INFO L87 Difference]: Start difference. First operand 178 states and 422 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:35,093 INFO L93 Difference]: Finished difference Result 217 states and 504 transitions. [2022-03-15 15:49:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:35,094 INFO L225 Difference]: With dead ends: 217 [2022-03-15 15:49:35,094 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 15:49:35,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:35,094 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:35,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 216 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-15 15:49:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 15:49:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 180. [2022-03-15 15:49:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.3966480446927374) internal successors, (429), 179 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 429 transitions. [2022-03-15 15:49:35,096 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 429 transitions. Word has length 17 [2022-03-15 15:49:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:35,097 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 429 transitions. [2022-03-15 15:49:35,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 429 transitions. [2022-03-15 15:49:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:35,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:35,097 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:35,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:35,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:35,312 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash 775233989, now seen corresponding path program 202 times [2022-03-15 15:49:35,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:35,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153377411] [2022-03-15 15:49:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:35,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:35,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153377411] [2022-03-15 15:49:35,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153377411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:35,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479467636] [2022-03-15 15:49:35,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:35,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:35,393 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:35,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 15:49:35,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:35,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:35,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:35,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:35,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:35,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:35,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:35,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:35,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:35,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479467636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:35,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:35,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:35,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916389981] [2022-03-15 15:49:35,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:35,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:35,626 INFO L87 Difference]: Start difference. First operand 180 states and 429 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:35,748 INFO L93 Difference]: Finished difference Result 246 states and 547 transitions. [2022-03-15 15:49:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:49:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:35,748 INFO L225 Difference]: With dead ends: 246 [2022-03-15 15:49:35,748 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 15:49:35,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:35,749 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:35,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 159 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 324 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-03-15 15:49:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 15:49:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 179. [2022-03-15 15:49:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.393258426966292) internal successors, (426), 178 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 426 transitions. [2022-03-15 15:49:35,751 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 426 transitions. Word has length 17 [2022-03-15 15:49:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:35,751 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 426 transitions. [2022-03-15 15:49:35,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 426 transitions. [2022-03-15 15:49:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:35,751 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:35,751 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:35,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:35,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:35,966 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1026058207, now seen corresponding path program 203 times [2022-03-15 15:49:35,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:35,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871621165] [2022-03-15 15:49:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:36,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:36,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871621165] [2022-03-15 15:49:36,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871621165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:36,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515143233] [2022-03-15 15:49:36,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:36,020 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:36,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 15:49:36,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:36,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:36,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:36,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:36,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:36,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:36,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:36,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:49:36,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:36,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:49:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:36,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515143233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:36,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:36,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:49:36,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847935564] [2022-03-15 15:49:36,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:36,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:49:36,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:36,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:49:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:49:36,207 INFO L87 Difference]: Start difference. First operand 179 states and 426 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:36,314 INFO L93 Difference]: Finished difference Result 207 states and 475 transitions. [2022-03-15 15:49:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:36,315 INFO L225 Difference]: With dead ends: 207 [2022-03-15 15:49:36,315 INFO L226 Difference]: Without dead ends: 201 [2022-03-15 15:49:36,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:36,315 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:36,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-03-15 15:49:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-15 15:49:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 179. [2022-03-15 15:49:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3820224719101124) internal successors, (424), 178 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 424 transitions. [2022-03-15 15:49:36,317 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 424 transitions. Word has length 17 [2022-03-15 15:49:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:36,317 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 424 transitions. [2022-03-15 15:49:36,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 424 transitions. [2022-03-15 15:49:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:36,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:36,318 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:36,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-15 15:49:36,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-15 15:49:36,533 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash -289704595, now seen corresponding path program 204 times [2022-03-15 15:49:36,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:36,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427746507] [2022-03-15 15:49:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:36,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:36,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427746507] [2022-03-15 15:49:36,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427746507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:36,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638920737] [2022-03-15 15:49:36,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:36,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:36,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:36,659 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:36,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 15:49:36,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:49:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:36,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:36,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:36,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:36,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:36,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:36,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:36,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:37,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638920737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:37,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:37,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:37,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902448656] [2022-03-15 15:49:37,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:37,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:37,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:37,043 INFO L87 Difference]: Start difference. First operand 179 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:37,173 INFO L93 Difference]: Finished difference Result 218 states and 496 transitions. [2022-03-15 15:49:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:37,174 INFO L225 Difference]: With dead ends: 218 [2022-03-15 15:49:37,174 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 15:49:37,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:37,174 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:37,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 74 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 179 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-03-15 15:49:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 15:49:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2022-03-15 15:49:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.3922651933701657) internal successors, (433), 181 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 433 transitions. [2022-03-15 15:49:37,176 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 433 transitions. Word has length 17 [2022-03-15 15:49:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:37,176 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 433 transitions. [2022-03-15 15:49:37,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 433 transitions. [2022-03-15 15:49:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:37,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:37,177 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:37,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-15 15:49:37,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-03-15 15:49:37,377 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1070412145, now seen corresponding path program 205 times [2022-03-15 15:49:37,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:37,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504570616] [2022-03-15 15:49:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:37,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:37,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504570616] [2022-03-15 15:49:37,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504570616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:37,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909459253] [2022-03-15 15:49:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:37,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:37,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:37,454 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 15:49:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:37,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:37,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:37,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:37,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:37,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:37,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:37,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:37,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:37,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:49:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:37,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909459253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:37,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:37,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:37,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804626834] [2022-03-15 15:49:37,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:37,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:37,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:37,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:37,759 INFO L87 Difference]: Start difference. First operand 182 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:37,850 INFO L93 Difference]: Finished difference Result 206 states and 479 transitions. [2022-03-15 15:49:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:37,850 INFO L225 Difference]: With dead ends: 206 [2022-03-15 15:49:37,850 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 15:49:37,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:37,851 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:37,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 80 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:49:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 15:49:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2022-03-15 15:49:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.388888888888889) internal successors, (430), 180 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 430 transitions. [2022-03-15 15:49:37,853 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 430 transitions. Word has length 17 [2022-03-15 15:49:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:37,853 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 430 transitions. [2022-03-15 15:49:37,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 430 transitions. [2022-03-15 15:49:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:37,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:37,853 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:37,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-15 15:49:38,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:38,054 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash 675489729, now seen corresponding path program 206 times [2022-03-15 15:49:38,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:38,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882419597] [2022-03-15 15:49:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:38,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882419597] [2022-03-15 15:49:38,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882419597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791562611] [2022-03-15 15:49:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:38,153 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 15:49:38,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:38,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:38,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:38,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:38,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:38,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:38,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:38,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:38,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:38,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:38,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791562611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:38,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:38,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:38,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243947623] [2022-03-15 15:49:38,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:38,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:38,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:38,396 INFO L87 Difference]: Start difference. First operand 181 states and 430 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:38,550 INFO L93 Difference]: Finished difference Result 207 states and 479 transitions. [2022-03-15 15:49:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:38,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:38,551 INFO L225 Difference]: With dead ends: 207 [2022-03-15 15:49:38,551 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 15:49:38,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:38,551 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:38,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 79 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 250 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-15 15:49:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 15:49:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2022-03-15 15:49:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.388888888888889) internal successors, (430), 180 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 430 transitions. [2022-03-15 15:49:38,554 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 430 transitions. Word has length 17 [2022-03-15 15:49:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:38,554 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 430 transitions. [2022-03-15 15:49:38,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 430 transitions. [2022-03-15 15:49:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:38,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:38,554 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:38,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-15 15:49:38,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-15 15:49:38,766 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1075758615, now seen corresponding path program 207 times [2022-03-15 15:49:38,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:38,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344317009] [2022-03-15 15:49:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:38,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:38,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344317009] [2022-03-15 15:49:38,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344317009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:38,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488778974] [2022-03-15 15:49:38,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:38,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:38,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:38,815 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:38,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 15:49:38,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:38,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:38,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:38,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:38,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:38,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:49:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:38,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:38,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:38,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:39,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:39,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:39,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488778974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:39,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:39,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:39,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863830807] [2022-03-15 15:49:39,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:39,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:39,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:39,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:39,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:39,020 INFO L87 Difference]: Start difference. First operand 181 states and 430 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:39,082 INFO L93 Difference]: Finished difference Result 213 states and 491 transitions. [2022-03-15 15:49:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:39,083 INFO L225 Difference]: With dead ends: 213 [2022-03-15 15:49:39,083 INFO L226 Difference]: Without dead ends: 213 [2022-03-15 15:49:39,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:39,083 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:39,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 130 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-03-15 15:49:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-15 15:49:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 181. [2022-03-15 15:49:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.388888888888889) internal successors, (430), 180 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 430 transitions. [2022-03-15 15:49:39,085 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 430 transitions. Word has length 17 [2022-03-15 15:49:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:39,085 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 430 transitions. [2022-03-15 15:49:39,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 430 transitions. [2022-03-15 15:49:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:39,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:39,085 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:39,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:39,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-15 15:49:39,301 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash 140259927, now seen corresponding path program 208 times [2022-03-15 15:49:39,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:39,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533312920] [2022-03-15 15:49:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:39,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:39,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:39,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533312920] [2022-03-15 15:49:39,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533312920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:39,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510520129] [2022-03-15 15:49:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:39,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:39,379 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:39,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 15:49:39,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:39,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:39,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:39,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:39,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:39,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:39,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:39,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:39,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:39,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:39,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:39,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510520129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:39,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:39,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:39,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613094027] [2022-03-15 15:49:39,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:39,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:39,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:39,598 INFO L87 Difference]: Start difference. First operand 181 states and 430 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:39,721 INFO L93 Difference]: Finished difference Result 204 states and 471 transitions. [2022-03-15 15:49:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:39,730 INFO L225 Difference]: With dead ends: 204 [2022-03-15 15:49:39,730 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 15:49:39,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:39,731 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:39,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-03-15 15:49:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 15:49:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2022-03-15 15:49:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.3854748603351954) internal successors, (427), 179 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 427 transitions. [2022-03-15 15:49:39,733 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 427 transitions. Word has length 17 [2022-03-15 15:49:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:39,733 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 427 transitions. [2022-03-15 15:49:39,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 427 transitions. [2022-03-15 15:49:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:39,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:39,733 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:39,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:39,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-15 15:49:39,949 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1112424561, now seen corresponding path program 209 times [2022-03-15 15:49:39,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:39,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091852592] [2022-03-15 15:49:39,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:39,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:40,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091852592] [2022-03-15 15:49:40,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091852592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:40,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245319581] [2022-03-15 15:49:40,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:40,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:40,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:40,024 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:40,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 15:49:40,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:40,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:40,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:40,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:40,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:40,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:40,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:40,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:40,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:40,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:40,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245319581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:40,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:40,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:49:40,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107487153] [2022-03-15 15:49:40,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:40,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:49:40,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:49:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:40,283 INFO L87 Difference]: Start difference. First operand 180 states and 427 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:40,369 INFO L93 Difference]: Finished difference Result 210 states and 485 transitions. [2022-03-15 15:49:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:40,370 INFO L225 Difference]: With dead ends: 210 [2022-03-15 15:49:40,370 INFO L226 Difference]: Without dead ends: 210 [2022-03-15 15:49:40,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:40,370 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:40,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-03-15 15:49:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-15 15:49:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 182. [2022-03-15 15:49:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.3922651933701657) internal successors, (433), 181 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 433 transitions. [2022-03-15 15:49:40,373 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 433 transitions. Word has length 17 [2022-03-15 15:49:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:40,373 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 433 transitions. [2022-03-15 15:49:40,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 433 transitions. [2022-03-15 15:49:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:40,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:40,373 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:40,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:40,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:40,573 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2077618885, now seen corresponding path program 210 times [2022-03-15 15:49:40,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:40,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861436282] [2022-03-15 15:49:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:40,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:40,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861436282] [2022-03-15 15:49:40,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861436282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:40,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357143516] [2022-03-15 15:49:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:40,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:40,648 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:40,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 15:49:40,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:40,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:40,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:40,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:40,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:40,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:40,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:49:40,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:40,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:49:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357143516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:40,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:40,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:40,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112821721] [2022-03-15 15:49:40,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:40,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:40,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:40,889 INFO L87 Difference]: Start difference. First operand 182 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:40,960 INFO L93 Difference]: Finished difference Result 212 states and 488 transitions. [2022-03-15 15:49:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:40,961 INFO L225 Difference]: With dead ends: 212 [2022-03-15 15:49:40,961 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:49:40,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:40,961 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:40,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 93 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-15 15:49:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:49:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2022-03-15 15:49:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.3854748603351954) internal successors, (427), 179 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 427 transitions. [2022-03-15 15:49:40,963 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 427 transitions. Word has length 17 [2022-03-15 15:49:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:40,963 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 427 transitions. [2022-03-15 15:49:40,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 427 transitions. [2022-03-15 15:49:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:40,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:40,964 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:40,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-15 15:49:41,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-15 15:49:41,180 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:41,180 INFO L85 PathProgramCache]: Analyzing trace with hash 728005249, now seen corresponding path program 211 times [2022-03-15 15:49:41,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:41,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128510653] [2022-03-15 15:49:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:41,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:41,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:41,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128510653] [2022-03-15 15:49:41,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128510653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:41,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331191000] [2022-03-15 15:49:41,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:41,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:41,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:41,272 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:41,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 15:49:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:41,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:41,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:41,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:41,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:41,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:41,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:41,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:41,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:41,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:49:41,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:41,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:49:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:41,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331191000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:41,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:41,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:41,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671899891] [2022-03-15 15:49:41,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:41,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:41,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:41,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:41,550 INFO L87 Difference]: Start difference. First operand 180 states and 427 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:41,706 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2022-03-15 15:49:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:41,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:41,707 INFO L225 Difference]: With dead ends: 205 [2022-03-15 15:49:41,707 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 15:49:41,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:41,707 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:41,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-03-15 15:49:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 15:49:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 179. [2022-03-15 15:49:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3820224719101124) internal successors, (424), 178 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 424 transitions. [2022-03-15 15:49:41,709 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 424 transitions. Word has length 17 [2022-03-15 15:49:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:41,709 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 424 transitions. [2022-03-15 15:49:41,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 424 transitions. [2022-03-15 15:49:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:41,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:41,710 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:41,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:41,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:41,910 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1892834071, now seen corresponding path program 212 times [2022-03-15 15:49:41,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:41,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338311252] [2022-03-15 15:49:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:41,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:41,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338311252] [2022-03-15 15:49:41,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338311252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:41,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139475254] [2022-03-15 15:49:41,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:41,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:41,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:41,993 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:41,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-15 15:49:42,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:42,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:42,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:42,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:42,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:42,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:42,294 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:42,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:49:42,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:49:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:42,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139475254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:42,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:42,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:42,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109344405] [2022-03-15 15:49:42,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:42,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:42,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:42,311 INFO L87 Difference]: Start difference. First operand 179 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:42,451 INFO L93 Difference]: Finished difference Result 216 states and 501 transitions. [2022-03-15 15:49:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:42,452 INFO L225 Difference]: With dead ends: 216 [2022-03-15 15:49:42,452 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:49:42,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:42,452 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:42,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 80 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:49:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:49:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2022-03-15 15:49:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3820224719101124) internal successors, (424), 178 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 424 transitions. [2022-03-15 15:49:42,454 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 424 transitions. Word has length 17 [2022-03-15 15:49:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:42,454 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 424 transitions. [2022-03-15 15:49:42,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 424 transitions. [2022-03-15 15:49:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:42,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:42,455 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:42,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-15 15:49:42,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-15 15:49:42,670 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1042016485, now seen corresponding path program 213 times [2022-03-15 15:49:42,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:42,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725494709] [2022-03-15 15:49:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:42,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:42,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725494709] [2022-03-15 15:49:42,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725494709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:42,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552212187] [2022-03-15 15:49:42,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:42,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:42,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:42,750 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:42,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-15 15:49:42,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:49:42,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:42,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:42,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:42,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:42,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:43,012 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:43,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:43,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552212187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:43,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:43,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:43,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684905916] [2022-03-15 15:49:43,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:43,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:43,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:43,021 INFO L87 Difference]: Start difference. First operand 179 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:43,090 INFO L93 Difference]: Finished difference Result 211 states and 491 transitions. [2022-03-15 15:49:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:43,091 INFO L225 Difference]: With dead ends: 211 [2022-03-15 15:49:43,091 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:49:43,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:49:43,091 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:43,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 102 Unchecked, 0.0s Time] [2022-03-15 15:49:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:49:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2022-03-15 15:49:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.3854748603351954) internal successors, (427), 179 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 427 transitions. [2022-03-15 15:49:43,093 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 427 transitions. Word has length 17 [2022-03-15 15:49:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:43,093 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 427 transitions. [2022-03-15 15:49:43,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 427 transitions. [2022-03-15 15:49:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:43,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:43,093 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:43,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:43,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-03-15 15:49:43,309 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 494632645, now seen corresponding path program 214 times [2022-03-15 15:49:43,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:43,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747340755] [2022-03-15 15:49:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:43,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:43,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747340755] [2022-03-15 15:49:43,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747340755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:43,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444191337] [2022-03-15 15:49:43,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:43,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:43,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:43,385 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:43,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-15 15:49:43,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:43,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:43,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:43,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:43,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:43,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:43,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:43,635 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:43,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:43,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444191337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:43,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:43,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:43,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936985411] [2022-03-15 15:49:43,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:43,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:43,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:43,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:43,643 INFO L87 Difference]: Start difference. First operand 180 states and 427 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:43,698 INFO L93 Difference]: Finished difference Result 215 states and 499 transitions. [2022-03-15 15:49:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:43,699 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:49:43,699 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 15:49:43,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:43,699 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:43,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:49:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 15:49:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 178. [2022-03-15 15:49:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.378531073446328) internal successors, (421), 177 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 421 transitions. [2022-03-15 15:49:43,705 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 421 transitions. Word has length 17 [2022-03-15 15:49:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:43,705 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 421 transitions. [2022-03-15 15:49:43,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 421 transitions. [2022-03-15 15:49:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:43,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:43,705 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:43,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:43,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:43,919 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1436938901, now seen corresponding path program 215 times [2022-03-15 15:49:43,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:43,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036715755] [2022-03-15 15:49:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:44,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:44,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036715755] [2022-03-15 15:49:44,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036715755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:44,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491773728] [2022-03-15 15:49:44,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:44,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:44,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:44,047 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:44,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-15 15:49:44,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:44,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:44,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:44,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:44,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:44,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:44,353 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:44,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:49:44,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:49:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:44,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491773728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:44,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:44,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:44,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982184533] [2022-03-15 15:49:44,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:44,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:44,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:44,372 INFO L87 Difference]: Start difference. First operand 178 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:44,550 INFO L93 Difference]: Finished difference Result 218 states and 502 transitions. [2022-03-15 15:49:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:44,551 INFO L225 Difference]: With dead ends: 218 [2022-03-15 15:49:44,551 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:49:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:44,552 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:44,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-03-15 15:49:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:49:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 178. [2022-03-15 15:49:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.378531073446328) internal successors, (421), 177 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 421 transitions. [2022-03-15 15:49:44,554 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 421 transitions. Word has length 17 [2022-03-15 15:49:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:44,554 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 421 transitions. [2022-03-15 15:49:44,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 421 transitions. [2022-03-15 15:49:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:44,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:44,555 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:44,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:44,756 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1106780051, now seen corresponding path program 216 times [2022-03-15 15:49:44,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:44,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184492397] [2022-03-15 15:49:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:44,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:44,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184492397] [2022-03-15 15:49:44,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184492397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:44,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494349468] [2022-03-15 15:49:44,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:44,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:44,829 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:44,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-15 15:49:44,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:44,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:44,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:44,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:44,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:44,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:45,041 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:45,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494349468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:45,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:45,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:45,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867901822] [2022-03-15 15:49:45,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:45,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:45,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:45,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:45,047 INFO L87 Difference]: Start difference. First operand 178 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:45,091 INFO L93 Difference]: Finished difference Result 214 states and 499 transitions. [2022-03-15 15:49:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:45,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:45,092 INFO L225 Difference]: With dead ends: 214 [2022-03-15 15:49:45,092 INFO L226 Difference]: Without dead ends: 214 [2022-03-15 15:49:45,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:45,092 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:45,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 94 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-03-15 15:49:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-15 15:49:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 180. [2022-03-15 15:49:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.3854748603351954) internal successors, (427), 179 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 427 transitions. [2022-03-15 15:49:45,094 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 427 transitions. Word has length 17 [2022-03-15 15:49:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:45,094 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 427 transitions. [2022-03-15 15:49:45,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 427 transitions. [2022-03-15 15:49:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:45,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:45,094 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:45,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:45,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-15 15:49:45,298 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1651538115, now seen corresponding path program 217 times [2022-03-15 15:49:45,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:45,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392452959] [2022-03-15 15:49:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:45,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392452959] [2022-03-15 15:49:45,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392452959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:45,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879532336] [2022-03-15 15:49:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:45,368 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:45,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-15 15:49:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:45,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:45,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:45,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:45,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:45,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:45,561 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:45,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879532336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:45,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:45,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:45,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526920305] [2022-03-15 15:49:45,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:45,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:45,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:45,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:45,567 INFO L87 Difference]: Start difference. First operand 180 states and 427 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:45,597 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2022-03-15 15:49:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:45,598 INFO L225 Difference]: With dead ends: 216 [2022-03-15 15:49:45,598 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:49:45,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:45,598 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:45,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2022-03-15 15:49:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:49:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2022-03-15 15:49:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3820224719101124) internal successors, (424), 178 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 424 transitions. [2022-03-15 15:49:45,600 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 424 transitions. Word has length 17 [2022-03-15 15:49:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 424 transitions. [2022-03-15 15:49:45,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 424 transitions. [2022-03-15 15:49:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:45,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:45,601 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:45,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:45,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-15 15:49:45,811 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2071974375, now seen corresponding path program 218 times [2022-03-15 15:49:45,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:45,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647260522] [2022-03-15 15:49:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:45,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647260522] [2022-03-15 15:49:45,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647260522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:45,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685555733] [2022-03-15 15:49:45,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:45,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:45,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:45,889 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:45,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-15 15:49:45,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:45,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:46,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:46,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:46,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:46,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:49:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:46,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:46,182 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:46,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:46,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685555733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:46,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:46,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:46,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427536143] [2022-03-15 15:49:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:46,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:46,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:46,191 INFO L87 Difference]: Start difference. First operand 179 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:46,245 INFO L93 Difference]: Finished difference Result 223 states and 514 transitions. [2022-03-15 15:49:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:46,245 INFO L225 Difference]: With dead ends: 223 [2022-03-15 15:49:46,245 INFO L226 Difference]: Without dead ends: 223 [2022-03-15 15:49:46,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:46,246 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:46,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-03-15 15:49:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-15 15:49:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-03-15 15:49:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.378531073446328) internal successors, (421), 177 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 421 transitions. [2022-03-15 15:49:46,248 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 421 transitions. Word has length 17 [2022-03-15 15:49:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:46,248 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 421 transitions. [2022-03-15 15:49:46,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 421 transitions. [2022-03-15 15:49:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:46,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:46,248 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:46,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:46,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-15 15:49:46,449 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1972168703, now seen corresponding path program 219 times [2022-03-15 15:49:46,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:46,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642085135] [2022-03-15 15:49:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:46,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:46,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642085135] [2022-03-15 15:49:46,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642085135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:46,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271269394] [2022-03-15 15:49:46,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:46,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:46,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:46,563 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:46,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-15 15:49:46,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:46,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:46,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:46,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:46,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:46,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:46,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:46,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:46,874 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:46,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:49:46,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:49:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:46,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271269394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:46,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:46,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:46,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919059273] [2022-03-15 15:49:46,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:46,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:46,893 INFO L87 Difference]: Start difference. First operand 178 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:47,027 INFO L93 Difference]: Finished difference Result 215 states and 494 transitions. [2022-03-15 15:49:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:47,028 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:49:47,028 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:49:47,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:47,028 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:47,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-03-15 15:49:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:49:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 177. [2022-03-15 15:49:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.375) internal successors, (418), 176 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 418 transitions. [2022-03-15 15:49:47,030 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 418 transitions. Word has length 17 [2022-03-15 15:49:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:47,030 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 418 transitions. [2022-03-15 15:49:47,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 418 transitions. [2022-03-15 15:49:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:47,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:47,031 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:47,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-15 15:49:47,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-15 15:49:47,231 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1000004069, now seen corresponding path program 220 times [2022-03-15 15:49:47,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:47,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419764228] [2022-03-15 15:49:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:47,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419764228] [2022-03-15 15:49:47,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419764228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:47,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120216639] [2022-03-15 15:49:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:47,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:47,287 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:47,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-15 15:49:47,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:47,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:47,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:47,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:47,498 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:47,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120216639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:47,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:47,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:47,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126639869] [2022-03-15 15:49:47,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:47,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:47,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:47,505 INFO L87 Difference]: Start difference. First operand 177 states and 418 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:47,546 INFO L93 Difference]: Finished difference Result 215 states and 502 transitions. [2022-03-15 15:49:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:47,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:47,546 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:49:47,546 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 15:49:47,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:47,546 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:47,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 53 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-03-15 15:49:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 15:49:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 180. [2022-03-15 15:49:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.3854748603351954) internal successors, (427), 179 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 427 transitions. [2022-03-15 15:49:47,548 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 427 transitions. Word has length 17 [2022-03-15 15:49:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:47,549 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 427 transitions. [2022-03-15 15:49:47,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 427 transitions. [2022-03-15 15:49:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:47,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:47,549 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:47,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-15 15:49:47,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-15 15:49:47,764 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash 536645061, now seen corresponding path program 221 times [2022-03-15 15:49:47,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:47,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357471668] [2022-03-15 15:49:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:47,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357471668] [2022-03-15 15:49:47,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357471668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:47,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871409985] [2022-03-15 15:49:47,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:47,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:47,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:47,845 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:47,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-15 15:49:47,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:47,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:47,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:47,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:47,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:48,044 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:48,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:48,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871409985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:48,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:48,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:48,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039871843] [2022-03-15 15:49:48,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:48,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:48,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:48,059 INFO L87 Difference]: Start difference. First operand 180 states and 427 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:48,089 INFO L93 Difference]: Finished difference Result 217 states and 505 transitions. [2022-03-15 15:49:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:48,090 INFO L225 Difference]: With dead ends: 217 [2022-03-15 15:49:48,090 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 15:49:48,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:48,090 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:48,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-03-15 15:49:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 15:49:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 179. [2022-03-15 15:49:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3820224719101124) internal successors, (424), 178 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 424 transitions. [2022-03-15 15:49:48,092 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 424 transitions. Word has length 17 [2022-03-15 15:49:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:48,092 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 424 transitions. [2022-03-15 15:49:48,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 424 transitions. [2022-03-15 15:49:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:48,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:48,093 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:48,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:48,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:48,307 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -34809745, now seen corresponding path program 222 times [2022-03-15 15:49:48,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:48,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713864077] [2022-03-15 15:49:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:48,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:48,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:48,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713864077] [2022-03-15 15:49:48,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713864077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:48,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738011806] [2022-03-15 15:49:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:48,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:48,367 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:48,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-15 15:49:48,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:48,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:48,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:48,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:48,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:48,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:48,584 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:48,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:48,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738011806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:48,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:48,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:48,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736426181] [2022-03-15 15:49:48,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:48,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:48,590 INFO L87 Difference]: Start difference. First operand 179 states and 424 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:48,625 INFO L93 Difference]: Finished difference Result 217 states and 503 transitions. [2022-03-15 15:49:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:48,626 INFO L225 Difference]: With dead ends: 217 [2022-03-15 15:49:48,626 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 15:49:48,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:48,627 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:48,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 76 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 100 Unchecked, 0.0s Time] [2022-03-15 15:49:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 15:49:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 181. [2022-03-15 15:49:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.388888888888889) internal successors, (430), 180 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 430 transitions. [2022-03-15 15:49:48,629 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 430 transitions. Word has length 17 [2022-03-15 15:49:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 430 transitions. [2022-03-15 15:49:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 430 transitions. [2022-03-15 15:49:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:48,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:48,629 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:48,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-15 15:49:48,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-15 15:49:48,835 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash -570039547, now seen corresponding path program 223 times [2022-03-15 15:49:48,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:48,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383363117] [2022-03-15 15:49:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:48,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:48,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383363117] [2022-03-15 15:49:48,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383363117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:48,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052284915] [2022-03-15 15:49:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:48,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:48,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:48,913 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:48,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-15 15:49:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:49,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:49,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:49,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:49,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:49,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:49,155 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:49,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:49,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052284915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:49,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:49,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:49,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130408082] [2022-03-15 15:49:49,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:49,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:49,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:49,163 INFO L87 Difference]: Start difference. First operand 181 states and 430 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:49,212 INFO L93 Difference]: Finished difference Result 227 states and 523 transitions. [2022-03-15 15:49:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:49,213 INFO L225 Difference]: With dead ends: 227 [2022-03-15 15:49:49,213 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 15:49:49,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:49,214 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:49,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 93 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2022-03-15 15:49:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 15:49:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2022-03-15 15:49:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.388888888888889) internal successors, (430), 180 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 430 transitions. [2022-03-15 15:49:49,216 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 430 transitions. Word has length 17 [2022-03-15 15:49:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:49,216 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 430 transitions. [2022-03-15 15:49:49,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 430 transitions. [2022-03-15 15:49:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:49,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:49,216 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:49,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:49,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-15 15:49:49,432 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1384423381, now seen corresponding path program 224 times [2022-03-15 15:49:49,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:49,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269316577] [2022-03-15 15:49:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:49,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:49,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269316577] [2022-03-15 15:49:49,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269316577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:49,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501865774] [2022-03-15 15:49:49,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:49,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:49,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:49,513 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:49,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-15 15:49:49,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:49,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:49,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:49,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:49,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:49,748 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:49,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2022-03-15 15:49:49,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:49:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:49,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501865774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:49,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:49,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:49:49,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997667965] [2022-03-15 15:49:49,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:49,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:49:49,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:49,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:49:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:49,761 INFO L87 Difference]: Start difference. First operand 181 states and 430 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:49,851 INFO L93 Difference]: Finished difference Result 218 states and 501 transitions. [2022-03-15 15:49:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:49,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:49,851 INFO L225 Difference]: With dead ends: 218 [2022-03-15 15:49:49,851 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:49:49,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:49,852 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:49,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 94 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 82 Unchecked, 0.0s Time] [2022-03-15 15:49:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:49:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 181. [2022-03-15 15:49:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.3833333333333333) internal successors, (429), 180 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 429 transitions. [2022-03-15 15:49:49,854 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 429 transitions. Word has length 17 [2022-03-15 15:49:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:49,854 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 429 transitions. [2022-03-15 15:49:49,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 429 transitions. [2022-03-15 15:49:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:49,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:49,854 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:49,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-15 15:49:50,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:50,071 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash 40231729, now seen corresponding path program 225 times [2022-03-15 15:49:50,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:50,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631000866] [2022-03-15 15:49:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:50,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:50,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631000866] [2022-03-15 15:49:50,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631000866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138528141] [2022-03-15 15:49:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:50,129 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:50,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-15 15:49:50,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:50,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:49:50,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:49:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:50,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:50,331 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:50,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:50,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138528141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:50,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:50,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:49:50,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042234161] [2022-03-15 15:49:50,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:50,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:49:50,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:49:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:49:50,341 INFO L87 Difference]: Start difference. First operand 181 states and 429 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:50,457 INFO L93 Difference]: Finished difference Result 253 states and 572 transitions. [2022-03-15 15:49:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:50,458 INFO L225 Difference]: With dead ends: 253 [2022-03-15 15:49:50,458 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 15:49:50,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:50,458 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:50,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 130 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-03-15 15:49:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 15:49:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 179. [2022-03-15 15:49:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.393258426966292) internal successors, (426), 178 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 426 transitions. [2022-03-15 15:49:50,460 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 426 transitions. Word has length 17 [2022-03-15 15:49:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:50,460 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 426 transitions. [2022-03-15 15:49:50,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 426 transitions. [2022-03-15 15:49:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:50,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:50,461 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:50,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-15 15:49:50,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:50,661 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1581846495, now seen corresponding path program 226 times [2022-03-15 15:49:50,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:50,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036606751] [2022-03-15 15:49:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:50,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:50,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036606751] [2022-03-15 15:49:50,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036606751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:50,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473252339] [2022-03-15 15:49:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:50,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:50,760 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:50,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-15 15:49:50,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:50,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:50,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:50,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:49:50,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:50,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:49:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:50,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:50,999 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:50,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:49:51,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:49:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:51,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473252339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:51,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:51,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:51,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669847486] [2022-03-15 15:49:51,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:51,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:51,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:51,018 INFO L87 Difference]: Start difference. First operand 179 states and 426 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:51,149 INFO L93 Difference]: Finished difference Result 233 states and 521 transitions. [2022-03-15 15:49:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:51,150 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:49:51,150 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 15:49:51,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:49:51,150 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:51,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-03-15 15:49:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 15:49:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 179. [2022-03-15 15:49:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3876404494382024) internal successors, (425), 178 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 425 transitions. [2022-03-15 15:49:51,152 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 425 transitions. Word has length 17 [2022-03-15 15:49:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:51,152 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 425 transitions. [2022-03-15 15:49:51,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 425 transitions. [2022-03-15 15:49:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:51,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:51,153 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:51,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:51,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:51,353 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1775616965, now seen corresponding path program 227 times [2022-03-15 15:49:51,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:51,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423810957] [2022-03-15 15:49:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:51,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:51,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423810957] [2022-03-15 15:49:51,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423810957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:51,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823655673] [2022-03-15 15:49:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:51,415 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:51,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-15 15:49:51,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:51,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:51,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:51,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:51,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:51,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:51,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:51,669 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:51,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:51,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823655673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:51,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:51,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:51,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555416621] [2022-03-15 15:49:51,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:51,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:51,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:51,676 INFO L87 Difference]: Start difference. First operand 179 states and 425 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:51,727 INFO L93 Difference]: Finished difference Result 241 states and 548 transitions. [2022-03-15 15:49:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:51,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:51,728 INFO L225 Difference]: With dead ends: 241 [2022-03-15 15:49:51,728 INFO L226 Difference]: Without dead ends: 241 [2022-03-15 15:49:51,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:51,728 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:51,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 113 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 161 Unchecked, 0.0s Time] [2022-03-15 15:49:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-15 15:49:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 179. [2022-03-15 15:49:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3876404494382024) internal successors, (425), 178 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 425 transitions. [2022-03-15 15:49:51,730 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 425 transitions. Word has length 17 [2022-03-15 15:49:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 425 transitions. [2022-03-15 15:49:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 425 transitions. [2022-03-15 15:49:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:51,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:51,731 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:51,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-15 15:49:51,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-15 15:49:51,938 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:51,939 INFO L85 PathProgramCache]: Analyzing trace with hash 3914137, now seen corresponding path program 228 times [2022-03-15 15:49:51,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:51,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593826573] [2022-03-15 15:49:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:52,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:52,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593826573] [2022-03-15 15:49:52,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593826573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:52,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943160042] [2022-03-15 15:49:52,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:52,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:52,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:52,020 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:52,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-15 15:49:52,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:52,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:52,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:52,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:49:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:52,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:52,368 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:52,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:52,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943160042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:52,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:52,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:52,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919769576] [2022-03-15 15:49:52,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:52,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:52,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:52,377 INFO L87 Difference]: Start difference. First operand 179 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:52,444 INFO L93 Difference]: Finished difference Result 230 states and 532 transitions. [2022-03-15 15:49:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:52,445 INFO L225 Difference]: With dead ends: 230 [2022-03-15 15:49:52,445 INFO L226 Difference]: Without dead ends: 230 [2022-03-15 15:49:52,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:52,445 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:52,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-03-15 15:49:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-15 15:49:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 179. [2022-03-15 15:49:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3876404494382024) internal successors, (425), 178 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 425 transitions. [2022-03-15 15:49:52,447 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 425 transitions. Word has length 17 [2022-03-15 15:49:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:52,447 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 425 transitions. [2022-03-15 15:49:52,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 425 transitions. [2022-03-15 15:49:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:52,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:52,448 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:52,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-15 15:49:52,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:52,648 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash 85309765, now seen corresponding path program 229 times [2022-03-15 15:49:52,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:52,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141113] [2022-03-15 15:49:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:52,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:52,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141113] [2022-03-15 15:49:52,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:52,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662083982] [2022-03-15 15:49:52,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:52,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:52,729 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:52,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-15 15:49:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:52,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:52,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:52,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:52,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:52,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:53,062 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:53,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:53,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662083982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:53,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:53,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:49:53,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606775935] [2022-03-15 15:49:53,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:53,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:53,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:53,071 INFO L87 Difference]: Start difference. First operand 179 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:53,292 INFO L93 Difference]: Finished difference Result 243 states and 543 transitions. [2022-03-15 15:49:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:53,293 INFO L225 Difference]: With dead ends: 243 [2022-03-15 15:49:53,293 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 15:49:53,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:53,293 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:53,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 144 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 300 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-03-15 15:49:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 15:49:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 179. [2022-03-15 15:49:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.3876404494382024) internal successors, (425), 178 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 425 transitions. [2022-03-15 15:49:53,295 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 425 transitions. Word has length 17 [2022-03-15 15:49:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:53,296 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 425 transitions. [2022-03-15 15:49:53,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 425 transitions. [2022-03-15 15:49:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:53,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:53,296 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:53,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-15 15:49:53,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:53,512 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash -782139883, now seen corresponding path program 230 times [2022-03-15 15:49:53,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:53,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480563163] [2022-03-15 15:49:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:53,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:53,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480563163] [2022-03-15 15:49:53,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480563163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:53,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162712779] [2022-03-15 15:49:53,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:53,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:53,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:53,596 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:53,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-15 15:49:53,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:53,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:53,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:49:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:53,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:49:53,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:53,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:49:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:53,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:53,857 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:53,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:49:53,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:49:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:53,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162712779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:53,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:53,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:49:53,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580671269] [2022-03-15 15:49:53,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:53,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:53,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:53,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:53,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:53,869 INFO L87 Difference]: Start difference. First operand 179 states and 425 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:54,027 INFO L93 Difference]: Finished difference Result 215 states and 497 transitions. [2022-03-15 15:49:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:54,027 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:49:54,027 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:49:54,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:54,027 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:54,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-03-15 15:49:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:49:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 177. [2022-03-15 15:49:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.3806818181818183) internal successors, (419), 176 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 419 transitions. [2022-03-15 15:49:54,029 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 419 transitions. Word has length 17 [2022-03-15 15:49:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:54,030 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 419 transitions. [2022-03-15 15:49:54,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 419 transitions. [2022-03-15 15:49:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:49:54,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:54,030 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:54,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:54,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-15 15:49:54,245 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1050504089, now seen corresponding path program 231 times [2022-03-15 15:49:54,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:54,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292631462] [2022-03-15 15:49:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:54,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:54,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292631462] [2022-03-15 15:49:54,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292631462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:54,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395228571] [2022-03-15 15:49:54,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:54,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:54,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:54,294 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:54,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-15 15:49:54,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:49:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:49:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:54,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:54,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:49:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:54,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:49:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:54,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:54,507 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:54,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:49:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:54,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395228571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:54,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:54,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:49:54,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833307867] [2022-03-15 15:49:54,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:54,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:49:54,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:49:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:49:54,513 INFO L87 Difference]: Start difference. First operand 177 states and 419 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:54,579 INFO L93 Difference]: Finished difference Result 213 states and 494 transitions. [2022-03-15 15:49:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:49:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:54,580 INFO L225 Difference]: With dead ends: 213 [2022-03-15 15:49:54,580 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:49:54,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:54,580 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:54,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 87 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 220 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-15 15:49:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:49:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2022-03-15 15:49:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.3850574712643677) internal successors, (415), 174 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 415 transitions. [2022-03-15 15:49:54,582 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 415 transitions. Word has length 17 [2022-03-15 15:49:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:54,582 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 415 transitions. [2022-03-15 15:49:54,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 415 transitions. [2022-03-15 15:49:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:49:54,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:54,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:54,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-15 15:49:54,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-03-15 15:49:54,799 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:54,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1470956816, now seen corresponding path program 232 times [2022-03-15 15:49:54,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:54,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913895978] [2022-03-15 15:49:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:54,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:54,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:54,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913895978] [2022-03-15 15:49:54,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913895978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:54,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967275367] [2022-03-15 15:49:54,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:54,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:54,943 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:54,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-15 15:49:54,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:54,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:49:54,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:55,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-15 15:49:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:55,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:55,421 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:55,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 60 [2022-03-15 15:49:55,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2022-03-15 15:49:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:55,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967275367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:55,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:55,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:49:55,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926052409] [2022-03-15 15:49:55,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:55,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:49:55,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:49:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:49:55,443 INFO L87 Difference]: Start difference. First operand 175 states and 415 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:55,669 INFO L93 Difference]: Finished difference Result 267 states and 598 transitions. [2022-03-15 15:49:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:49:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:55,669 INFO L225 Difference]: With dead ends: 267 [2022-03-15 15:49:55,669 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 15:49:55,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:55,670 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:55,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 548 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-15 15:49:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 15:49:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2022-03-15 15:49:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.3806818181818183) internal successors, (419), 176 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 419 transitions. [2022-03-15 15:49:55,672 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 419 transitions. Word has length 18 [2022-03-15 15:49:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:55,672 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 419 transitions. [2022-03-15 15:49:55,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 419 transitions. [2022-03-15 15:49:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:49:55,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:55,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:55,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:55,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-15 15:49:55,888 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash -575005954, now seen corresponding path program 233 times [2022-03-15 15:49:55,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:55,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228977577] [2022-03-15 15:49:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:55,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:56,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:56,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228977577] [2022-03-15 15:49:56,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228977577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:56,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013368305] [2022-03-15 15:49:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:56,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:56,022 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:56,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-15 15:49:56,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:49:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:56,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:49:56,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:56,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:49:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:56,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:56,641 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:56,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:49:56,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:49:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:56,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013368305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:56,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:56,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:49:56,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856306699] [2022-03-15 15:49:56,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:56,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:49:56,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:49:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:56,675 INFO L87 Difference]: Start difference. First operand 177 states and 419 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:56,951 INFO L93 Difference]: Finished difference Result 257 states and 580 transitions. [2022-03-15 15:49:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:49:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:49:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:56,952 INFO L225 Difference]: With dead ends: 257 [2022-03-15 15:49:56,952 INFO L226 Difference]: Without dead ends: 242 [2022-03-15 15:49:56,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:56,952 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:56,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 238 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 647 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-15 15:49:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-15 15:49:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 183. [2022-03-15 15:49:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.357142857142857) internal successors, (429), 182 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 429 transitions. [2022-03-15 15:49:56,954 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 429 transitions. Word has length 18 [2022-03-15 15:49:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:56,954 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 429 transitions. [2022-03-15 15:49:56,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 429 transitions. [2022-03-15 15:49:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:49:56,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:56,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:56,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:57,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:57,171 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:57,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1492956144, now seen corresponding path program 234 times [2022-03-15 15:49:57,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:57,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422218303] [2022-03-15 15:49:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:57,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:57,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:57,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422218303] [2022-03-15 15:49:57,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422218303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:57,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372064774] [2022-03-15 15:49:57,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:57,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:57,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:57,360 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:57,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-15 15:49:57,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:57,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:57,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:49:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:57,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:49:57,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:57,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:49:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:57,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:58,109 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:58,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2022-03-15 15:49:58,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-03-15 15:49:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:58,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372064774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:58,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:58,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:49:58,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741438587] [2022-03-15 15:49:58,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:58,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:49:58,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:49:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:58,128 INFO L87 Difference]: Start difference. First operand 183 states and 429 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:58,487 INFO L93 Difference]: Finished difference Result 261 states and 590 transitions. [2022-03-15 15:49:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:49:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:58,488 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:49:58,488 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 15:49:58,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:58,488 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:58,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 255 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 516 Invalid, 0 Unknown, 179 Unchecked, 0.2s Time] [2022-03-15 15:49:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 15:49:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 186. [2022-03-15 15:49:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.3567567567567567) internal successors, (436), 185 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 436 transitions. [2022-03-15 15:49:58,491 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 436 transitions. Word has length 18 [2022-03-15 15:49:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:58,491 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 436 transitions. [2022-03-15 15:49:58,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 436 transitions. [2022-03-15 15:49:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:49:58,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:58,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:58,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:58,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-15 15:49:58,692 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1222579506, now seen corresponding path program 235 times [2022-03-15 15:49:58,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:58,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181161989] [2022-03-15 15:49:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:58,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:58,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:58,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181161989] [2022-03-15 15:49:58,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181161989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:58,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46889234] [2022-03-15 15:49:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:58,855 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:49:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-15 15:49:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:49:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:59,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:59,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:49:59,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:59,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:49:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:59,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:59,461 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:59,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 74 [2022-03-15 15:49:59,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-03-15 15:49:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:59,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46889234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:59,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:59,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:49:59,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763973482] [2022-03-15 15:49:59,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:59,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:49:59,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:49:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:59,487 INFO L87 Difference]: Start difference. First operand 186 states and 436 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:59,715 INFO L93 Difference]: Finished difference Result 261 states and 587 transitions. [2022-03-15 15:49:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:49:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:59,716 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:49:59,716 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 15:49:59,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:59,716 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:59,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 226 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 641 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-15 15:49:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 15:49:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 191. [2022-03-15 15:49:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.336842105263158) internal successors, (444), 190 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 444 transitions. [2022-03-15 15:49:59,719 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 444 transitions. Word has length 18 [2022-03-15 15:49:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:59,719 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 444 transitions. [2022-03-15 15:49:59,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 444 transitions. [2022-03-15 15:49:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:49:59,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:59,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:59,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:59,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:59,935 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash -469599776, now seen corresponding path program 236 times [2022-03-15 15:49:59,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:59,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008013040] [2022-03-15 15:49:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:00,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:00,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008013040] [2022-03-15 15:50:00,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008013040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:00,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702131929] [2022-03-15 15:50:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:00,139 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:00,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:00,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:00,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-15 15:50:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:00,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:00,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:00,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:50:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:00,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:00,965 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:00,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 74 [2022-03-15 15:50:00,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-03-15 15:50:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:00,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702131929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:00,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:00,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:00,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017507459] [2022-03-15 15:50:00,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:00,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:00,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:00,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:00,994 INFO L87 Difference]: Start difference. First operand 191 states and 444 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:01,200 INFO L93 Difference]: Finished difference Result 259 states and 581 transitions. [2022-03-15 15:50:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:50:01,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:01,201 INFO L225 Difference]: With dead ends: 259 [2022-03-15 15:50:01,201 INFO L226 Difference]: Without dead ends: 250 [2022-03-15 15:50:01,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:01,201 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:01,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 201 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 512 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-15 15:50:01,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-15 15:50:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 192. [2022-03-15 15:50:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.3350785340314135) internal successors, (446), 191 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 446 transitions. [2022-03-15 15:50:01,204 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 446 transitions. Word has length 18 [2022-03-15 15:50:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:01,204 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 446 transitions. [2022-03-15 15:50:01,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 446 transitions. [2022-03-15 15:50:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:01,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:01,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:01,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:01,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:01,420 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1557660798, now seen corresponding path program 237 times [2022-03-15 15:50:01,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:01,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338172382] [2022-03-15 15:50:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:01,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:01,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:01,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338172382] [2022-03-15 15:50:01,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338172382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:01,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360640502] [2022-03-15 15:50:01,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:01,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:01,583 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:01,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-15 15:50:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:01,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:01,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:01,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:01,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:01,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:01,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:02,176 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:02,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:50:02,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:50:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:02,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360640502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:02,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:02,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:02,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896464024] [2022-03-15 15:50:02,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:02,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:02,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:02,209 INFO L87 Difference]: Start difference. First operand 192 states and 446 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:02,375 INFO L93 Difference]: Finished difference Result 263 states and 589 transitions. [2022-03-15 15:50:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:50:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:02,376 INFO L225 Difference]: With dead ends: 263 [2022-03-15 15:50:02,376 INFO L226 Difference]: Without dead ends: 250 [2022-03-15 15:50:02,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:02,376 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:02,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 235 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 473 Invalid, 0 Unknown, 181 Unchecked, 0.1s Time] [2022-03-15 15:50:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-15 15:50:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2022-03-15 15:50:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2022-03-15 15:50:02,378 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 18 [2022-03-15 15:50:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2022-03-15 15:50:02,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2022-03-15 15:50:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:02,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:02,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:02,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:02,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:02,583 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash -509740110, now seen corresponding path program 238 times [2022-03-15 15:50:02,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:02,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805559188] [2022-03-15 15:50:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:02,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:02,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805559188] [2022-03-15 15:50:02,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805559188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:02,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534875833] [2022-03-15 15:50:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:02,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:02,781 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:02,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-15 15:50:02,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:02,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:02,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:02,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:02,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:02,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:02,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:03,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:03,611 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:03,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 64 [2022-03-15 15:50:03,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2022-03-15 15:50:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:03,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534875833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:03,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:03,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:50:03,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359554044] [2022-03-15 15:50:03,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:03,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:50:03,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:50:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:03,641 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:05,748 INFO L93 Difference]: Finished difference Result 421 states and 837 transitions. [2022-03-15 15:50:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:50:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:05,749 INFO L225 Difference]: With dead ends: 421 [2022-03-15 15:50:05,749 INFO L226 Difference]: Without dead ends: 374 [2022-03-15 15:50:05,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:50:05,749 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:05,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 263 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 682 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-03-15 15:50:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-15 15:50:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 198. [2022-03-15 15:50:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3654822335025383) internal successors, (466), 197 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 466 transitions. [2022-03-15 15:50:05,752 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 466 transitions. Word has length 18 [2022-03-15 15:50:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:05,752 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 466 transitions. [2022-03-15 15:50:05,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 466 transitions. [2022-03-15 15:50:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:05,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:05,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:05,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:05,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:05,953 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1842463132, now seen corresponding path program 239 times [2022-03-15 15:50:05,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:05,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707464698] [2022-03-15 15:50:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:05,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:06,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:06,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707464698] [2022-03-15 15:50:06,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707464698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:06,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612393267] [2022-03-15 15:50:06,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:06,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:06,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:06,129 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:06,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-15 15:50:06,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:06,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:06,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:06,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:06,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:06,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:06,797 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:06,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:06,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:06,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612393267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:06,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:06,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:06,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924339134] [2022-03-15 15:50:06,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:06,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:06,843 INFO L87 Difference]: Start difference. First operand 198 states and 466 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:07,086 INFO L93 Difference]: Finished difference Result 265 states and 594 transitions. [2022-03-15 15:50:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:50:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:07,086 INFO L225 Difference]: With dead ends: 265 [2022-03-15 15:50:07,086 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:50:07,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:07,087 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:07,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 229 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 659 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-03-15 15:50:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:50:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 204. [2022-03-15 15:50:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.354679802955665) internal successors, (478), 203 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 478 transitions. [2022-03-15 15:50:07,089 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 478 transitions. Word has length 18 [2022-03-15 15:50:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:07,089 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 478 transitions. [2022-03-15 15:50:07,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 478 transitions. [2022-03-15 15:50:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:07,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:07,090 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:07,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-15 15:50:07,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-15 15:50:07,305 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1534553974, now seen corresponding path program 240 times [2022-03-15 15:50:07,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:07,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267861053] [2022-03-15 15:50:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:07,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:07,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267861053] [2022-03-15 15:50:07,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267861053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:07,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123735554] [2022-03-15 15:50:07,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:07,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:07,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:07,478 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:07,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-15 15:50:07,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:07,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:07,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:07,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:50:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:07,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:50:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:07,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:08,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:08,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 15:50:08,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:08,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 15:50:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:08,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123735554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:08,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:08,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:08,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080309963] [2022-03-15 15:50:08,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:08,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:08,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:08,157 INFO L87 Difference]: Start difference. First operand 204 states and 478 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:08,415 INFO L93 Difference]: Finished difference Result 258 states and 581 transitions. [2022-03-15 15:50:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:50:08,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:08,416 INFO L225 Difference]: With dead ends: 258 [2022-03-15 15:50:08,416 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 15:50:08,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:08,416 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:08,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 218 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 475 Invalid, 0 Unknown, 259 Unchecked, 0.2s Time] [2022-03-15 15:50:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 15:50:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 206. [2022-03-15 15:50:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.341463414634146) internal successors, (480), 205 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 480 transitions. [2022-03-15 15:50:08,419 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 480 transitions. Word has length 18 [2022-03-15 15:50:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:08,419 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 480 transitions. [2022-03-15 15:50:08,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 480 transitions. [2022-03-15 15:50:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:08,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:08,420 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:08,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-15 15:50:08,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-15 15:50:08,635 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -44877672, now seen corresponding path program 241 times [2022-03-15 15:50:08,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:08,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345950048] [2022-03-15 15:50:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:08,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:08,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345950048] [2022-03-15 15:50:08,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345950048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:08,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709823198] [2022-03-15 15:50:08,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:08,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:08,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:08,840 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:08,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-15 15:50:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:08,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:09,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:09,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:09,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:09,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:50:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:09,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:09,637 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:09,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:50:09,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:50:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:09,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709823198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:09,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:09,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:09,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031784516] [2022-03-15 15:50:09,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:09,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:09,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:09,680 INFO L87 Difference]: Start difference. First operand 206 states and 480 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:09,876 INFO L93 Difference]: Finished difference Result 268 states and 598 transitions. [2022-03-15 15:50:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:50:09,876 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:09,876 INFO L225 Difference]: With dead ends: 268 [2022-03-15 15:50:09,876 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:50:09,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:09,877 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:09,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 497 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-03-15 15:50:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:50:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 207. [2022-03-15 15:50:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3398058252427183) internal successors, (482), 206 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 482 transitions. [2022-03-15 15:50:09,879 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 482 transitions. Word has length 18 [2022-03-15 15:50:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:09,879 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 482 transitions. [2022-03-15 15:50:09,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 482 transitions. [2022-03-15 15:50:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:09,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:09,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:09,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:10,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-15 15:50:10,092 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 290203620, now seen corresponding path program 242 times [2022-03-15 15:50:10,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:10,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789204812] [2022-03-15 15:50:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:10,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:10,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789204812] [2022-03-15 15:50:10,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789204812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:10,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744770144] [2022-03-15 15:50:10,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:10,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:10,252 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:10,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-15 15:50:10,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:10,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:10,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:10,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:50:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:10,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:10,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:10,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:10,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2022-03-15 15:50:10,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:10,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2022-03-15 15:50:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:10,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744770144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:10,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:10,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:10,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831376187] [2022-03-15 15:50:10,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:10,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:10,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:10,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:10,833 INFO L87 Difference]: Start difference. First operand 207 states and 482 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:11,112 INFO L93 Difference]: Finished difference Result 265 states and 595 transitions. [2022-03-15 15:50:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:50:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:11,112 INFO L225 Difference]: With dead ends: 265 [2022-03-15 15:50:11,112 INFO L226 Difference]: Without dead ends: 258 [2022-03-15 15:50:11,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:50:11,113 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:11,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 208 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 560 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-03-15 15:50:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-15 15:50:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 208. [2022-03-15 15:50:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.342995169082126) internal successors, (485), 207 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 485 transitions. [2022-03-15 15:50:11,115 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 485 transitions. Word has length 18 [2022-03-15 15:50:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:11,115 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 485 transitions. [2022-03-15 15:50:11,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 485 transitions. [2022-03-15 15:50:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:11,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:11,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:11,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:11,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:11,318 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1777197288, now seen corresponding path program 243 times [2022-03-15 15:50:11,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:11,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522367148] [2022-03-15 15:50:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:11,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:11,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:11,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522367148] [2022-03-15 15:50:11,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522367148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:11,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511935174] [2022-03-15 15:50:11,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:11,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:11,539 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:11,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-15 15:50:11,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:11,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:11,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:11,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:11,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:12,236 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:12,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:50:12,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:50:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:12,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511935174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:12,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:12,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:12,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749720767] [2022-03-15 15:50:12,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:12,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:12,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:12,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:12,287 INFO L87 Difference]: Start difference. First operand 208 states and 485 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:13,867 INFO L93 Difference]: Finished difference Result 408 states and 814 transitions. [2022-03-15 15:50:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:50:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:13,868 INFO L225 Difference]: With dead ends: 408 [2022-03-15 15:50:13,868 INFO L226 Difference]: Without dead ends: 361 [2022-03-15 15:50:13,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:50:13,868 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:13,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 281 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 703 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-03-15 15:50:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-15 15:50:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 208. [2022-03-15 15:50:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.342995169082126) internal successors, (485), 207 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 485 transitions. [2022-03-15 15:50:13,871 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 485 transitions. Word has length 18 [2022-03-15 15:50:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:13,871 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 485 transitions. [2022-03-15 15:50:13,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 485 transitions. [2022-03-15 15:50:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:13,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:13,871 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:13,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:14,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:14,087 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash -930675952, now seen corresponding path program 244 times [2022-03-15 15:50:14,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:14,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995804513] [2022-03-15 15:50:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:14,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:14,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:14,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995804513] [2022-03-15 15:50:14,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995804513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:14,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948024962] [2022-03-15 15:50:14,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:14,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:14,313 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:14,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:14,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-15 15:50:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:14,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:14,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:50:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:14,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:14,979 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:14,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:14,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:15,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948024962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:15,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:15,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:50:15,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058795689] [2022-03-15 15:50:15,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:15,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:50:15,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:50:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:15,035 INFO L87 Difference]: Start difference. First operand 208 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:15,493 INFO L93 Difference]: Finished difference Result 333 states and 712 transitions. [2022-03-15 15:50:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:50:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:15,494 INFO L225 Difference]: With dead ends: 333 [2022-03-15 15:50:15,494 INFO L226 Difference]: Without dead ends: 310 [2022-03-15 15:50:15,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:50:15,494 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:15,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 332 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 831 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-03-15 15:50:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-15 15:50:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 215. [2022-03-15 15:50:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.3598130841121496) internal successors, (505), 214 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 505 transitions. [2022-03-15 15:50:15,497 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 505 transitions. Word has length 18 [2022-03-15 15:50:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:15,497 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 505 transitions. [2022-03-15 15:50:15,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 505 transitions. [2022-03-15 15:50:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:15,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:15,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:15,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:15,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-15 15:50:15,707 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash -595594660, now seen corresponding path program 245 times [2022-03-15 15:50:15,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:15,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787233246] [2022-03-15 15:50:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:15,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:15,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787233246] [2022-03-15 15:50:15,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787233246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:15,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602628068] [2022-03-15 15:50:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:15,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:15,898 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-15 15:50:15,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:16,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:16,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:16,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:50:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:16,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:16,405 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:16,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:16,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:16,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602628068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:16,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:16,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:16,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294902060] [2022-03-15 15:50:16,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:16,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:16,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:16,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:16,463 INFO L87 Difference]: Start difference. First operand 215 states and 505 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:16,818 INFO L93 Difference]: Finished difference Result 313 states and 680 transitions. [2022-03-15 15:50:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:50:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:16,819 INFO L225 Difference]: With dead ends: 313 [2022-03-15 15:50:16,819 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 15:50:16,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:50:16,833 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:16,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 326 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 861 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-03-15 15:50:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 15:50:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 216. [2022-03-15 15:50:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.3627906976744186) internal successors, (508), 215 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 508 transitions. [2022-03-15 15:50:16,836 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 508 transitions. Word has length 18 [2022-03-15 15:50:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 508 transitions. [2022-03-15 15:50:16,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 508 transitions. [2022-03-15 15:50:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:16,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:16,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:16,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:17,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:17,050 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1631971728, now seen corresponding path program 246 times [2022-03-15 15:50:17,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:17,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834061830] [2022-03-15 15:50:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:17,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:17,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:17,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834061830] [2022-03-15 15:50:17,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834061830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:17,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775988633] [2022-03-15 15:50:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:17,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:17,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:17,236 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-15 15:50:17,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:17,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:17,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:17,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:17,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:17,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:17,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:17,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:50:17,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:17,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:50:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:17,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775988633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:17,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:17,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:50:17,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783824257] [2022-03-15 15:50:17,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:17,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:50:17,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:50:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:17,830 INFO L87 Difference]: Start difference. First operand 216 states and 508 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:18,251 INFO L93 Difference]: Finished difference Result 305 states and 675 transitions. [2022-03-15 15:50:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:50:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:18,251 INFO L225 Difference]: With dead ends: 305 [2022-03-15 15:50:18,251 INFO L226 Difference]: Without dead ends: 291 [2022-03-15 15:50:18,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:50:18,252 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:18,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 241 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 749 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-03-15 15:50:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-15 15:50:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 217. [2022-03-15 15:50:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.3703703703703702) internal successors, (512), 216 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 512 transitions. [2022-03-15 15:50:18,254 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 512 transitions. Word has length 18 [2022-03-15 15:50:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:18,254 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 512 transitions. [2022-03-15 15:50:18,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 512 transitions. [2022-03-15 15:50:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:18,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:18,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:18,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:18,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:18,470 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1592588516, now seen corresponding path program 247 times [2022-03-15 15:50:18,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:18,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184491478] [2022-03-15 15:50:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:18,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:18,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:18,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184491478] [2022-03-15 15:50:18,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184491478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:18,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794467578] [2022-03-15 15:50:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:18,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:18,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:18,581 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:18,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-15 15:50:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:18,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:18,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:18,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:50:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:18,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:18,982 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:18,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:50:18,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:50:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:19,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794467578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:19,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:19,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:19,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347905788] [2022-03-15 15:50:19,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:19,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:19,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:19,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:19,057 INFO L87 Difference]: Start difference. First operand 217 states and 512 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:19,439 INFO L93 Difference]: Finished difference Result 384 states and 829 transitions. [2022-03-15 15:50:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:50:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:19,440 INFO L225 Difference]: With dead ends: 384 [2022-03-15 15:50:19,440 INFO L226 Difference]: Without dead ends: 364 [2022-03-15 15:50:19,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:50:19,440 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:19,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 309 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 677 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-03-15 15:50:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-15 15:50:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 232. [2022-03-15 15:50:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.4242424242424243) internal successors, (560), 231 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 560 transitions. [2022-03-15 15:50:19,443 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 560 transitions. Word has length 18 [2022-03-15 15:50:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:19,443 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 560 transitions. [2022-03-15 15:50:19,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 560 transitions. [2022-03-15 15:50:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:19,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:19,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:19,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:19,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:19,659 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash -474812392, now seen corresponding path program 248 times [2022-03-15 15:50:19,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:19,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204935210] [2022-03-15 15:50:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:19,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:19,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204935210] [2022-03-15 15:50:19,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204935210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:19,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669568482] [2022-03-15 15:50:19,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:19,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:19,850 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:19,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-15 15:50:19,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:19,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:19,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:19,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:19,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:19,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:20,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:20,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 79 [2022-03-15 15:50:20,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:20,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 59 [2022-03-15 15:50:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:20,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669568482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:20,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:20,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:20,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055378198] [2022-03-15 15:50:20,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:20,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:20,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:20,399 INFO L87 Difference]: Start difference. First operand 232 states and 560 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:21,249 INFO L93 Difference]: Finished difference Result 415 states and 891 transitions. [2022-03-15 15:50:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:50:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:21,250 INFO L225 Difference]: With dead ends: 415 [2022-03-15 15:50:21,250 INFO L226 Difference]: Without dead ends: 384 [2022-03-15 15:50:21,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:50:21,250 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:21,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 411 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1224 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-03-15 15:50:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-15 15:50:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 242. [2022-03-15 15:50:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4647302904564317) internal successors, (594), 241 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 594 transitions. [2022-03-15 15:50:21,253 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 594 transitions. Word has length 18 [2022-03-15 15:50:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:21,253 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 594 transitions. [2022-03-15 15:50:21,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 594 transitions. [2022-03-15 15:50:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:21,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:21,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:21,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:21,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:21,468 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1673984144, now seen corresponding path program 249 times [2022-03-15 15:50:21,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:21,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247003844] [2022-03-15 15:50:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:21,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:21,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247003844] [2022-03-15 15:50:21,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247003844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:21,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059662103] [2022-03-15 15:50:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:21,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:21,605 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:21,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-15 15:50:21,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:50:21,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:21,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:21,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:21,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:21,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:21,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:22,281 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:22,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 15:50:22,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 15:50:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:22,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059662103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:22,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:22,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:50:22,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397920643] [2022-03-15 15:50:22,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:22,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:50:22,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:22,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:50:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:22,361 INFO L87 Difference]: Start difference. First operand 242 states and 594 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:23,406 INFO L93 Difference]: Finished difference Result 500 states and 1038 transitions. [2022-03-15 15:50:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:50:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:23,407 INFO L225 Difference]: With dead ends: 500 [2022-03-15 15:50:23,407 INFO L226 Difference]: Without dead ends: 461 [2022-03-15 15:50:23,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:50:23,407 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 155 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 422 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:50:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-15 15:50:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 246. [2022-03-15 15:50:23,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.477551020408163) internal successors, (607), 245 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 607 transitions. [2022-03-15 15:50:23,411 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 607 transitions. Word has length 18 [2022-03-15 15:50:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:23,411 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 607 transitions. [2022-03-15 15:50:23,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 607 transitions. [2022-03-15 15:50:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:23,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:23,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:23,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:23,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-15 15:50:23,631 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1816037310, now seen corresponding path program 250 times [2022-03-15 15:50:23,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:23,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744565919] [2022-03-15 15:50:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:23,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:23,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744565919] [2022-03-15 15:50:23,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744565919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:23,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784923583] [2022-03-15 15:50:23,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:23,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:23,808 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:23,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-15 15:50:23,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:23,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:24,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:24,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:24,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:24,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:50:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:24,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:24,586 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:24,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:24,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:24,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784923583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:24,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:24,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:24,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534960170] [2022-03-15 15:50:24,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:24,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:24,661 INFO L87 Difference]: Start difference. First operand 246 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:25,213 INFO L93 Difference]: Finished difference Result 397 states and 897 transitions. [2022-03-15 15:50:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:50:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:25,214 INFO L225 Difference]: With dead ends: 397 [2022-03-15 15:50:25,215 INFO L226 Difference]: Without dead ends: 375 [2022-03-15 15:50:25,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:50:25,215 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:25,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 396 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 167 Unchecked, 0.4s Time] [2022-03-15 15:50:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-15 15:50:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 274. [2022-03-15 15:50:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.4835164835164836) internal successors, (678), 273 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 678 transitions. [2022-03-15 15:50:25,218 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 678 transitions. Word has length 18 [2022-03-15 15:50:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:25,218 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 678 transitions. [2022-03-15 15:50:25,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 678 transitions. [2022-03-15 15:50:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:25,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:25,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:25,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:25,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-15 15:50:25,419 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 898087120, now seen corresponding path program 251 times [2022-03-15 15:50:25,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:25,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547866385] [2022-03-15 15:50:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:25,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:25,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547866385] [2022-03-15 15:50:25,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547866385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:25,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729007100] [2022-03-15 15:50:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:25,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:25,619 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:25,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-15 15:50:25,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:25,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:25,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:25,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:25,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:26,366 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:26,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:50:26,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:50:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:26,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729007100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:26,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:26,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:26,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953003627] [2022-03-15 15:50:26,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:26,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:26,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:26,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:26,440 INFO L87 Difference]: Start difference. First operand 274 states and 678 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:26,850 INFO L93 Difference]: Finished difference Result 373 states and 850 transitions. [2022-03-15 15:50:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:50:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:26,851 INFO L225 Difference]: With dead ends: 373 [2022-03-15 15:50:26,851 INFO L226 Difference]: Without dead ends: 360 [2022-03-15 15:50:26,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:26,859 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:26,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 424 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 902 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-03-15 15:50:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-03-15 15:50:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 266. [2022-03-15 15:50:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.483018867924528) internal successors, (658), 265 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 658 transitions. [2022-03-15 15:50:26,863 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 658 transitions. Word has length 18 [2022-03-15 15:50:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:26,863 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 658 transitions. [2022-03-15 15:50:26,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 658 transitions. [2022-03-15 15:50:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:26,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:26,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:26,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:27,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-15 15:50:27,080 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash -681344526, now seen corresponding path program 252 times [2022-03-15 15:50:27,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:27,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102947814] [2022-03-15 15:50:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:27,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:27,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:27,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102947814] [2022-03-15 15:50:27,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102947814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:27,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223295180] [2022-03-15 15:50:27,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:27,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:27,274 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:27,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-15 15:50:27,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:27,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:27,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:50:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:27,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:28,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:28,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:50:28,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:28,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:50:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:28,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223295180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:28,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:28,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:28,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215698032] [2022-03-15 15:50:28,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:28,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:28,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:28,219 INFO L87 Difference]: Start difference. First operand 266 states and 658 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:28,378 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2022-03-15 15:50:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:50:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:28,378 INFO L225 Difference]: With dead ends: 319 [2022-03-15 15:50:28,378 INFO L226 Difference]: Without dead ends: 313 [2022-03-15 15:50:28,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:50:28,379 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:28,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 227 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 182 Unchecked, 0.1s Time] [2022-03-15 15:50:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-15 15:50:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 272. [2022-03-15 15:50:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.4797047970479706) internal successors, (672), 271 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 672 transitions. [2022-03-15 15:50:28,382 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 672 transitions. Word has length 18 [2022-03-15 15:50:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:28,382 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 672 transitions. [2022-03-15 15:50:28,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 672 transitions. [2022-03-15 15:50:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:28,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:28,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:28,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-15 15:50:28,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-15 15:50:28,595 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1921443488, now seen corresponding path program 253 times [2022-03-15 15:50:28,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:28,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696135154] [2022-03-15 15:50:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:28,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:28,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696135154] [2022-03-15 15:50:28,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696135154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:28,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077197625] [2022-03-15 15:50:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:28,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:28,753 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:28,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-15 15:50:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:28,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:29,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:29,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:29,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:29,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:50:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:29,404 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:29,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:29,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:29,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077197625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:29,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:29,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:29,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718103506] [2022-03-15 15:50:29,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:29,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:29,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:29,454 INFO L87 Difference]: Start difference. First operand 272 states and 672 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:29,875 INFO L93 Difference]: Finished difference Result 398 states and 889 transitions. [2022-03-15 15:50:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:50:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:29,876 INFO L225 Difference]: With dead ends: 398 [2022-03-15 15:50:29,876 INFO L226 Difference]: Without dead ends: 378 [2022-03-15 15:50:29,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:50:29,876 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:29,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 491 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 848 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-03-15 15:50:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-15 15:50:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 271. [2022-03-15 15:50:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.4962962962962965) internal successors, (674), 270 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 674 transitions. [2022-03-15 15:50:29,879 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 674 transitions. Word has length 18 [2022-03-15 15:50:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:29,880 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 674 transitions. [2022-03-15 15:50:29,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 674 transitions. [2022-03-15 15:50:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:29,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:29,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:29,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:30,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-15 15:50:30,095 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -346263234, now seen corresponding path program 254 times [2022-03-15 15:50:30,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:30,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18106577] [2022-03-15 15:50:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:30,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:30,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18106577] [2022-03-15 15:50:30,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18106577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:30,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888756571] [2022-03-15 15:50:30,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:30,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:30,243 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:30,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-15 15:50:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:30,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:30,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:30,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:50:30,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:30,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:30,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:30,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:30,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 15:50:30,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:30,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 15:50:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:30,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888756571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:30,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:30,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:30,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527314820] [2022-03-15 15:50:30,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:30,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:30,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:30,854 INFO L87 Difference]: Start difference. First operand 271 states and 674 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:31,414 INFO L93 Difference]: Finished difference Result 350 states and 822 transitions. [2022-03-15 15:50:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:50:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:31,414 INFO L225 Difference]: With dead ends: 350 [2022-03-15 15:50:31,414 INFO L226 Difference]: Without dead ends: 336 [2022-03-15 15:50:31,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:50:31,415 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:31,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 292 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 805 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-03-15 15:50:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-15 15:50:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 273. [2022-03-15 15:50:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.5036764705882355) internal successors, (681), 272 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 681 transitions. [2022-03-15 15:50:31,418 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 681 transitions. Word has length 18 [2022-03-15 15:50:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:31,418 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 681 transitions. [2022-03-15 15:50:31,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 681 transitions. [2022-03-15 15:50:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:31,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:31,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:31,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:31,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-15 15:50:31,634 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1881303154, now seen corresponding path program 255 times [2022-03-15 15:50:31,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:31,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200376465] [2022-03-15 15:50:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:31,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:31,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200376465] [2022-03-15 15:50:31,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200376465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:31,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185558501] [2022-03-15 15:50:31,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:31,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:31,793 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:31,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-15 15:50:31,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:31,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:31,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:31,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:31,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:31,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:32,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:32,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:32,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:50:32,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:32,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:50:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:32,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185558501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:32,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:32,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:32,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450885751] [2022-03-15 15:50:32,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:32,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:32,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:32,515 INFO L87 Difference]: Start difference. First operand 273 states and 681 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:32,992 INFO L93 Difference]: Finished difference Result 338 states and 804 transitions. [2022-03-15 15:50:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:50:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:32,993 INFO L225 Difference]: With dead ends: 338 [2022-03-15 15:50:32,993 INFO L226 Difference]: Without dead ends: 324 [2022-03-15 15:50:32,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:50:32,993 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:32,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 224 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 677 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-03-15 15:50:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-15 15:50:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 273. [2022-03-15 15:50:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.5036764705882355) internal successors, (681), 272 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 681 transitions. [2022-03-15 15:50:32,996 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 681 transitions. Word has length 18 [2022-03-15 15:50:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:32,996 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 681 transitions. [2022-03-15 15:50:32,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 681 transitions. [2022-03-15 15:50:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:32,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:32,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:33,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-15 15:50:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-15 15:50:33,203 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1037881586, now seen corresponding path program 256 times [2022-03-15 15:50:33,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:33,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701422227] [2022-03-15 15:50:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:33,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:33,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:33,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701422227] [2022-03-15 15:50:33,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701422227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:33,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259395400] [2022-03-15 15:50:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:33,396 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:33,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-15 15:50:33,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:33,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:33,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:33,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:50:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:33,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:33,990 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:33,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:33,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:34,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259395400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:34,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:34,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:50:34,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124985224] [2022-03-15 15:50:34,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:34,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:34,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:34,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:34,050 INFO L87 Difference]: Start difference. First operand 273 states and 681 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:34,296 INFO L93 Difference]: Finished difference Result 412 states and 935 transitions. [2022-03-15 15:50:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:50:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:34,297 INFO L225 Difference]: With dead ends: 412 [2022-03-15 15:50:34,297 INFO L226 Difference]: Without dead ends: 388 [2022-03-15 15:50:34,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:50:34,298 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:34,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 320 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 661 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-03-15 15:50:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-03-15 15:50:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 290. [2022-03-15 15:50:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.5121107266435985) internal successors, (726), 289 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 726 transitions. [2022-03-15 15:50:34,301 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 726 transitions. Word has length 18 [2022-03-15 15:50:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:34,301 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 726 transitions. [2022-03-15 15:50:34,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 726 transitions. [2022-03-15 15:50:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:34,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:34,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:34,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:34,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:34,512 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -654297696, now seen corresponding path program 257 times [2022-03-15 15:50:34,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:34,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136894939] [2022-03-15 15:50:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:34,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:34,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:34,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136894939] [2022-03-15 15:50:34,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136894939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:34,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414540400] [2022-03-15 15:50:34,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:34,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:34,662 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:34,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-15 15:50:34,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:34,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:34,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:34,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:34,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:34,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:50:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:34,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:35,278 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:35,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:35,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:35,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414540400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:35,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:35,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:50:35,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46499914] [2022-03-15 15:50:35,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:35,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:35,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:35,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:35,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:35,363 INFO L87 Difference]: Start difference. First operand 290 states and 726 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:35,903 INFO L93 Difference]: Finished difference Result 397 states and 903 transitions. [2022-03-15 15:50:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:50:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:35,904 INFO L225 Difference]: With dead ends: 397 [2022-03-15 15:50:35,904 INFO L226 Difference]: Without dead ends: 379 [2022-03-15 15:50:35,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:50:35,904 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:35,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 323 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 711 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-03-15 15:50:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-03-15 15:50:35,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 267. [2022-03-15 15:50:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.4849624060150375) internal successors, (661), 266 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 661 transitions. [2022-03-15 15:50:35,908 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 661 transitions. Word has length 18 [2022-03-15 15:50:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 661 transitions. [2022-03-15 15:50:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 661 transitions. [2022-03-15 15:50:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:35,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:35,908 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:35,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:36,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:36,109 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1372962878, now seen corresponding path program 258 times [2022-03-15 15:50:36,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:36,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701707012] [2022-03-15 15:50:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:36,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:36,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:36,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701707012] [2022-03-15 15:50:36,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701707012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:36,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415702800] [2022-03-15 15:50:36,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:36,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:36,326 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:36,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-15 15:50:36,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:50:36,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:36,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:36,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:36,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:36,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:36,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:50:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:36,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:37,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:37,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:50:37,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:37,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:50:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:37,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415702800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:37,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:37,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:50:37,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953959723] [2022-03-15 15:50:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:37,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:37,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:37,212 INFO L87 Difference]: Start difference. First operand 267 states and 661 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:37,699 INFO L93 Difference]: Finished difference Result 322 states and 763 transitions. [2022-03-15 15:50:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:50:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:37,699 INFO L225 Difference]: With dead ends: 322 [2022-03-15 15:50:37,699 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 15:50:37,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:50:37,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:37,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 204 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 550 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-03-15 15:50:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 15:50:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 268. [2022-03-15 15:50:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.48689138576779) internal successors, (664), 267 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 664 transitions. [2022-03-15 15:50:37,702 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 664 transitions. Word has length 18 [2022-03-15 15:50:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:37,703 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 664 transitions. [2022-03-15 15:50:37,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 664 transitions. [2022-03-15 15:50:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:37,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:37,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:37,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-15 15:50:37,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2022-03-15 15:50:37,903 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -694438030, now seen corresponding path program 259 times [2022-03-15 15:50:37,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:37,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398455886] [2022-03-15 15:50:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:38,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:38,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398455886] [2022-03-15 15:50:38,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398455886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:38,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303946161] [2022-03-15 15:50:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:38,130 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:38,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-15 15:50:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:38,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:38,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:38,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:38,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:38,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:38,848 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:38,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 15:50:38,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 15:50:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:38,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303946161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:38,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:38,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:50:38,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979180491] [2022-03-15 15:50:38,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:38,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:38,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:38,928 INFO L87 Difference]: Start difference. First operand 268 states and 664 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:40,667 INFO L93 Difference]: Finished difference Result 518 states and 1077 transitions. [2022-03-15 15:50:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:50:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:40,679 INFO L225 Difference]: With dead ends: 518 [2022-03-15 15:50:40,679 INFO L226 Difference]: Without dead ends: 469 [2022-03-15 15:50:40,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:50:40,680 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 137 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:40,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 423 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1042 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2022-03-15 15:50:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-03-15 15:50:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 271. [2022-03-15 15:50:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.4962962962962965) internal successors, (674), 270 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 674 transitions. [2022-03-15 15:50:40,683 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 674 transitions. Word has length 18 [2022-03-15 15:50:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:40,683 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 674 transitions. [2022-03-15 15:50:40,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 674 transitions. [2022-03-15 15:50:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:40,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:40,683 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:40,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-15 15:50:40,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:40,885 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1854956554, now seen corresponding path program 260 times [2022-03-15 15:50:40,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:40,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169080994] [2022-03-15 15:50:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:40,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:40,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:40,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169080994] [2022-03-15 15:50:40,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169080994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:40,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400826052] [2022-03-15 15:50:40,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:40,970 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:40,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-15 15:50:40,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:40,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:50:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:41,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:41,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:50:41,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:41,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:50:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:41,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:41,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:41,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:50:41,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:41,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:50:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:41,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400826052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:41,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:41,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:50:41,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99546000] [2022-03-15 15:50:41,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:50:41,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:50:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:50:41,211 INFO L87 Difference]: Start difference. First operand 271 states and 674 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:41,507 INFO L93 Difference]: Finished difference Result 337 states and 782 transitions. [2022-03-15 15:50:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:50:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:41,508 INFO L225 Difference]: With dead ends: 337 [2022-03-15 15:50:41,508 INFO L226 Difference]: Without dead ends: 329 [2022-03-15 15:50:41,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:41,509 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:41,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 161 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 405 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 15:50:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-15 15:50:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 270. [2022-03-15 15:50:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.483271375464684) internal successors, (668), 269 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 668 transitions. [2022-03-15 15:50:41,511 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 668 transitions. Word has length 18 [2022-03-15 15:50:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:41,511 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 668 transitions. [2022-03-15 15:50:41,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 668 transitions. [2022-03-15 15:50:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:41,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:41,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:41,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:41,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-15 15:50:41,727 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1619619522, now seen corresponding path program 261 times [2022-03-15 15:50:41,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:41,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675054757] [2022-03-15 15:50:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:41,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:41,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:41,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675054757] [2022-03-15 15:50:41,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675054757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:41,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473536704] [2022-03-15 15:50:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:41,846 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:41,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-15 15:50:41,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:42,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:42,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:42,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:42,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:50:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:42,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:42,300 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:42,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:50:42,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:50:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:42,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473536704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:42,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:42,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:50:42,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337957372] [2022-03-15 15:50:42,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:42,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:42,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:42,363 INFO L87 Difference]: Start difference. First operand 270 states and 668 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:42,736 INFO L93 Difference]: Finished difference Result 393 states and 900 transitions. [2022-03-15 15:50:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:50:42,736 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:42,737 INFO L225 Difference]: With dead ends: 393 [2022-03-15 15:50:42,737 INFO L226 Difference]: Without dead ends: 367 [2022-03-15 15:50:42,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:50:42,737 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:42,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 280 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 702 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-03-15 15:50:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-03-15 15:50:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 286. [2022-03-15 15:50:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.5052631578947366) internal successors, (714), 285 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 714 transitions. [2022-03-15 15:50:42,740 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 714 transitions. Word has length 18 [2022-03-15 15:50:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:42,740 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 714 transitions. [2022-03-15 15:50:42,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 714 transitions. [2022-03-15 15:50:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:42,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:42,741 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:42,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:42,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:42,957 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash 607946866, now seen corresponding path program 262 times [2022-03-15 15:50:42,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:42,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267753795] [2022-03-15 15:50:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:43,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:43,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267753795] [2022-03-15 15:50:43,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267753795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:43,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121992337] [2022-03-15 15:50:43,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:43,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:43,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:43,078 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:43,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-15 15:50:43,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:43,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:43,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:43,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:43,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:43,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:43,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:43,535 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:43,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:50:43,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:50:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:43,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121992337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:43,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:43,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:50:43,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145879025] [2022-03-15 15:50:43,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:43,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:43,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:43,603 INFO L87 Difference]: Start difference. First operand 286 states and 714 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:44,665 INFO L93 Difference]: Finished difference Result 476 states and 1032 transitions. [2022-03-15 15:50:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:50:44,665 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:44,666 INFO L225 Difference]: With dead ends: 476 [2022-03-15 15:50:44,666 INFO L226 Difference]: Without dead ends: 434 [2022-03-15 15:50:44,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:50:44,666 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:44,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 384 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1068 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-03-15 15:50:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-15 15:50:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 287. [2022-03-15 15:50:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.513986013986014) internal successors, (719), 286 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 719 transitions. [2022-03-15 15:50:44,677 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 719 transitions. Word has length 18 [2022-03-15 15:50:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:44,677 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 719 transitions. [2022-03-15 15:50:44,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 719 transitions. [2022-03-15 15:50:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:44,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:44,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:44,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:44,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-15 15:50:44,894 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:44,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1538223894, now seen corresponding path program 263 times [2022-03-15 15:50:44,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:44,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4221514] [2022-03-15 15:50:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:44,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:45,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:45,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4221514] [2022-03-15 15:50:45,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4221514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:45,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293888597] [2022-03-15 15:50:45,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:45,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:45,030 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:45,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-15 15:50:45,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:45,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:45,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:45,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:45,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:45,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:45,600 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:50:45,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:50:45,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:50:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:45,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293888597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:45,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:45,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:50:45,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58401752] [2022-03-15 15:50:45,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:45,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:50:45,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:45,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:50:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:45,696 INFO L87 Difference]: Start difference. First operand 287 states and 719 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:47,094 INFO L93 Difference]: Finished difference Result 485 states and 1049 transitions. [2022-03-15 15:50:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:50:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:47,095 INFO L225 Difference]: With dead ends: 485 [2022-03-15 15:50:47,095 INFO L226 Difference]: Without dead ends: 443 [2022-03-15 15:50:47,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=2050, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:50:47,096 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 152 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:47,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 395 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:50:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-15 15:50:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 288. [2022-03-15 15:50:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.508710801393728) internal successors, (720), 287 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 720 transitions. [2022-03-15 15:50:47,099 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 720 transitions. Word has length 18 [2022-03-15 15:50:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:47,099 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 720 transitions. [2022-03-15 15:50:47,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 720 transitions. [2022-03-15 15:50:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:47,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:47,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:47,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-15 15:50:47,312 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash 649959282, now seen corresponding path program 264 times [2022-03-15 15:50:47,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:47,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588783867] [2022-03-15 15:50:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:47,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:47,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588783867] [2022-03-15 15:50:47,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588783867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:47,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692126869] [2022-03-15 15:50:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:47,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:47,476 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:47,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-15 15:50:47,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:47,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:47,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:47,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:47,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:50:47,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:47,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:47,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:47,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:47,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 76 [2022-03-15 15:50:47,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:47,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 52 [2022-03-15 15:50:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:48,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692126869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:48,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:48,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:50:48,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490217992] [2022-03-15 15:50:48,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:48,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:50:48,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:48,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:50:48,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:48,021 INFO L87 Difference]: Start difference. First operand 288 states and 720 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:48,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:48,993 INFO L93 Difference]: Finished difference Result 409 states and 951 transitions. [2022-03-15 15:50:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:50:48,994 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:48,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:48,994 INFO L225 Difference]: With dead ends: 409 [2022-03-15 15:50:48,994 INFO L226 Difference]: Without dead ends: 371 [2022-03-15 15:50:48,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:50:48,994 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:48,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 210 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:50:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-15 15:50:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 298. [2022-03-15 15:50:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.5286195286195285) internal successors, (751), 297 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 751 transitions. [2022-03-15 15:50:48,998 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 751 transitions. Word has length 18 [2022-03-15 15:50:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:48,998 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 751 transitions. [2022-03-15 15:50:48,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 751 transitions. [2022-03-15 15:50:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:48,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:48,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:49,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-15 15:50:49,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:49,213 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -734565980, now seen corresponding path program 265 times [2022-03-15 15:50:49,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:49,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716535660] [2022-03-15 15:50:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:49,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:49,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716535660] [2022-03-15 15:50:49,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716535660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:49,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332793954] [2022-03-15 15:50:49,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:49,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:49,364 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:49,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-15 15:50:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:49,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:49,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:49,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:49,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:50:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:49,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:50,022 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:50,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:50,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:50,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332793954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:50,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:50,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:50,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001289901] [2022-03-15 15:50:50,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:50,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:50,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:50,108 INFO L87 Difference]: Start difference. First operand 298 states and 751 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:50,671 INFO L93 Difference]: Finished difference Result 496 states and 1139 transitions. [2022-03-15 15:50:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:50:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:50,672 INFO L225 Difference]: With dead ends: 496 [2022-03-15 15:50:50,672 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 15:50:50,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:50:50,672 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:50,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 413 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 678 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-03-15 15:50:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 15:50:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2022-03-15 15:50:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.571022727272727) internal successors, (905), 352 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 905 transitions. [2022-03-15 15:50:50,676 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 905 transitions. Word has length 18 [2022-03-15 15:50:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:50,676 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 905 transitions. [2022-03-15 15:50:50,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 905 transitions. [2022-03-15 15:50:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:50,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:50,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:50,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-15 15:50:50,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-15 15:50:50,891 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:50,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1652516170, now seen corresponding path program 266 times [2022-03-15 15:50:50,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:50,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936496047] [2022-03-15 15:50:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:50,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:51,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:51,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936496047] [2022-03-15 15:50:51,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936496047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:51,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421956548] [2022-03-15 15:50:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:51,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:51,038 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:51,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-15 15:50:51,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:51,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:51,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:51,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:50:51,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:51,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:50:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:51,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:51,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:51,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 15:50:51,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:51,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 15:50:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:51,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421956548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:51,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:51,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:51,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450520851] [2022-03-15 15:50:51,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:51,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:51,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:51,837 INFO L87 Difference]: Start difference. First operand 353 states and 905 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:52,210 INFO L93 Difference]: Finished difference Result 421 states and 1029 transitions. [2022-03-15 15:50:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:50:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:52,211 INFO L225 Difference]: With dead ends: 421 [2022-03-15 15:50:52,211 INFO L226 Difference]: Without dead ends: 411 [2022-03-15 15:50:52,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:50:52,211 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:52,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 250 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 556 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-03-15 15:50:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-15 15:50:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 357. [2022-03-15 15:50:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.5646067415730336) internal successors, (913), 356 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 913 transitions. [2022-03-15 15:50:52,215 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 913 transitions. Word has length 18 [2022-03-15 15:50:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:52,215 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 913 transitions. [2022-03-15 15:50:52,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 913 transitions. [2022-03-15 15:50:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:52,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:52,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:52,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:52,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:52,419 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 950271844, now seen corresponding path program 267 times [2022-03-15 15:50:52,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:52,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871600127] [2022-03-15 15:50:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:52,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:52,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871600127] [2022-03-15 15:50:52,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871600127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:52,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067683243] [2022-03-15 15:50:52,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:52,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:52,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:52,553 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:52,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-15 15:50:52,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:52,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:52,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:52,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:50:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:52,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:53,104 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:53,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:53,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:53,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067683243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:53,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:53,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:53,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449481009] [2022-03-15 15:50:53,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:53,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:53,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:53,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:53,165 INFO L87 Difference]: Start difference. First operand 357 states and 913 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:53,547 INFO L93 Difference]: Finished difference Result 483 states and 1121 transitions. [2022-03-15 15:50:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:50:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:53,548 INFO L225 Difference]: With dead ends: 483 [2022-03-15 15:50:53,548 INFO L226 Difference]: Without dead ends: 466 [2022-03-15 15:50:53,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:50:53,549 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:53,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 393 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 671 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-03-15 15:50:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-15 15:50:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 345. [2022-03-15 15:50:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.572674418604651) internal successors, (885), 344 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 885 transitions. [2022-03-15 15:50:53,552 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 885 transitions. Word has length 18 [2022-03-15 15:50:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:53,553 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 885 transitions. [2022-03-15 15:50:53,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 885 transitions. [2022-03-15 15:50:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:53,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:53,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:53,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-15 15:50:53,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:53,769 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1063019480, now seen corresponding path program 268 times [2022-03-15 15:50:53,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:53,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661349652] [2022-03-15 15:50:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:53,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:53,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661349652] [2022-03-15 15:50:53,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661349652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:53,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216968462] [2022-03-15 15:50:53,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:53,987 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:53,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-15 15:50:54,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:54,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:54,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:54,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:54,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:54,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:54,598 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:54,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:54,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:54,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216968462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:54,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:54,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:54,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708032685] [2022-03-15 15:50:54,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:54,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:54,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:54,660 INFO L87 Difference]: Start difference. First operand 345 states and 885 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:55,152 INFO L93 Difference]: Finished difference Result 531 states and 1212 transitions. [2022-03-15 15:50:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:50:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:55,153 INFO L225 Difference]: With dead ends: 531 [2022-03-15 15:50:55,153 INFO L226 Difference]: Without dead ends: 505 [2022-03-15 15:50:55,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:50:55,154 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:55,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 378 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 783 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-15 15:50:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-15 15:50:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 357. [2022-03-15 15:50:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.587078651685393) internal successors, (921), 356 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 921 transitions. [2022-03-15 15:50:55,158 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 921 transitions. Word has length 18 [2022-03-15 15:50:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:55,158 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 921 transitions. [2022-03-15 15:50:55,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 921 transitions. [2022-03-15 15:50:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:55,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:55,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:55,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-15 15:50:55,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:55,363 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:55,364 INFO L85 PathProgramCache]: Analyzing trace with hash -629159802, now seen corresponding path program 269 times [2022-03-15 15:50:55,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:55,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047285593] [2022-03-15 15:50:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:55,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:55,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:55,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047285593] [2022-03-15 15:50:55,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047285593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:55,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889599747] [2022-03-15 15:50:55,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:55,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:55,577 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:55,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-15 15:50:55,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:55,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:55,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:55,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:55,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:55,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:50:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:55,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:56,415 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:56,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:56,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:56,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889599747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:56,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:56,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:56,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206772195] [2022-03-15 15:50:56,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:56,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:56,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:56,501 INFO L87 Difference]: Start difference. First operand 357 states and 921 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:57,043 INFO L93 Difference]: Finished difference Result 490 states and 1146 transitions. [2022-03-15 15:50:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:50:57,043 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:57,044 INFO L225 Difference]: With dead ends: 490 [2022-03-15 15:50:57,044 INFO L226 Difference]: Without dead ends: 478 [2022-03-15 15:50:57,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:50:57,044 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:57,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 495 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 800 Invalid, 0 Unknown, 168 Unchecked, 0.3s Time] [2022-03-15 15:50:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-15 15:50:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 347. [2022-03-15 15:50:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.5895953757225434) internal successors, (896), 346 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 896 transitions. [2022-03-15 15:50:57,048 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 896 transitions. Word has length 18 [2022-03-15 15:50:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:57,049 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 896 transitions. [2022-03-15 15:50:57,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 896 transitions. [2022-03-15 15:50:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:57,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:57,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:57,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:57,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:57,255 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1398100772, now seen corresponding path program 270 times [2022-03-15 15:50:57,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:57,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169761759] [2022-03-15 15:50:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:57,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:57,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169761759] [2022-03-15 15:50:57,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169761759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:57,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214978786] [2022-03-15 15:50:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:57,431 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:57,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-15 15:50:57,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:57,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:57,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:50:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:57,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:57,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:50:57,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:57,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:50:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:57,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:58,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:58,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:50:58,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:58,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:50:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:58,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214978786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:58,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:58,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:58,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784614270] [2022-03-15 15:50:58,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:58,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:58,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:58,335 INFO L87 Difference]: Start difference. First operand 347 states and 896 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:58,833 INFO L93 Difference]: Finished difference Result 440 states and 1058 transitions. [2022-03-15 15:50:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:50:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:50:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:58,834 INFO L225 Difference]: With dead ends: 440 [2022-03-15 15:50:58,834 INFO L226 Difference]: Without dead ends: 431 [2022-03-15 15:50:58,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:50:58,834 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:58,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 291 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 613 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-03-15 15:50:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-03-15 15:50:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 353. [2022-03-15 15:50:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.59375) internal successors, (913), 352 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 913 transitions. [2022-03-15 15:50:58,838 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 913 transitions. Word has length 18 [2022-03-15 15:50:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:58,838 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 913 transitions. [2022-03-15 15:50:58,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 913 transitions. [2022-03-15 15:50:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:50:58,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:58,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:58,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:59,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:59,054 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash -319053642, now seen corresponding path program 271 times [2022-03-15 15:50:59,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:59,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044631135] [2022-03-15 15:50:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:59,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:59,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:59,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044631135] [2022-03-15 15:50:59,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044631135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:59,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55501563] [2022-03-15 15:50:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:59,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:59,243 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:50:59,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-15 15:50:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:59,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:50:59,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:59,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:59,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:50:59,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:59,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:50:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:59,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:59,917 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:50:59,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:50:59,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:50:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:59,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55501563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:59,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:59,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:50:59,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531301465] [2022-03-15 15:50:59,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:59,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:50:59,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:50:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:59,979 INFO L87 Difference]: Start difference. First operand 353 states and 913 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:00,178 INFO L93 Difference]: Finished difference Result 456 states and 1097 transitions. [2022-03-15 15:51:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:51:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:00,179 INFO L225 Difference]: With dead ends: 456 [2022-03-15 15:51:00,179 INFO L226 Difference]: Without dead ends: 439 [2022-03-15 15:51:00,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:51:00,179 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:00,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 411 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 534 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-03-15 15:51:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-03-15 15:51:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 355. [2022-03-15 15:51:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.598870056497175) internal successors, (920), 354 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 920 transitions. [2022-03-15 15:51:00,183 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 920 transitions. Word has length 18 [2022-03-15 15:51:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:00,183 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 920 transitions. [2022-03-15 15:51:00,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 920 transitions. [2022-03-15 15:51:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:00,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:00,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:00,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:00,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-15 15:51:00,395 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:00,395 INFO L85 PathProgramCache]: Analyzing trace with hash -669300136, now seen corresponding path program 272 times [2022-03-15 15:51:00,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:00,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597638806] [2022-03-15 15:51:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:00,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:00,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597638806] [2022-03-15 15:51:00,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597638806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:00,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072391797] [2022-03-15 15:51:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:00,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:00,637 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:00,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-15 15:51:00,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:00,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:00,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:00,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:00,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:01,440 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:01,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:51:01,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:51:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:01,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072391797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:01,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:01,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:51:01,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622630281] [2022-03-15 15:51:01,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:01,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:51:01,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:51:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:51:01,514 INFO L87 Difference]: Start difference. First operand 355 states and 920 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:03,676 INFO L93 Difference]: Finished difference Result 667 states and 1420 transitions. [2022-03-15 15:51:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:51:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:03,678 INFO L225 Difference]: With dead ends: 667 [2022-03-15 15:51:03,678 INFO L226 Difference]: Without dead ends: 613 [2022-03-15 15:51:03,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:51:03,678 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:03,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 428 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 945 Invalid, 0 Unknown, 241 Unchecked, 0.4s Time] [2022-03-15 15:51:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-15 15:51:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 349. [2022-03-15 15:51:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.5775862068965516) internal successors, (897), 348 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 897 transitions. [2022-03-15 15:51:03,682 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 897 transitions. Word has length 18 [2022-03-15 15:51:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 897 transitions. [2022-03-15 15:51:03,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 897 transitions. [2022-03-15 15:51:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:03,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:03,683 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:03,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-15 15:51:03,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-15 15:51:03,892 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1379752140, now seen corresponding path program 273 times [2022-03-15 15:51:03,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:03,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515025182] [2022-03-15 15:51:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:03,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:03,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:03,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515025182] [2022-03-15 15:51:03,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515025182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:03,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308796867] [2022-03-15 15:51:03,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:03,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:03,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:03,986 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:03,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-15 15:51:04,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:51:04,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:51:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:04,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:04,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:51:04,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:04,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:51:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:04,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:04,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:04,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:51:04,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:04,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:51:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:04,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308796867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:04,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:04,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:51:04,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750125529] [2022-03-15 15:51:04,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:04,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:51:04,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:51:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:04,326 INFO L87 Difference]: Start difference. First operand 349 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:04,539 INFO L93 Difference]: Finished difference Result 426 states and 1047 transitions. [2022-03-15 15:51:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:51:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:04,539 INFO L225 Difference]: With dead ends: 426 [2022-03-15 15:51:04,539 INFO L226 Difference]: Without dead ends: 426 [2022-03-15 15:51:04,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:04,540 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:04,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-15 15:51:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-15 15:51:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 348. [2022-03-15 15:51:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.5763688760806915) internal successors, (894), 347 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 894 transitions. [2022-03-15 15:51:04,543 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 894 transitions. Word has length 18 [2022-03-15 15:51:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:04,543 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 894 transitions. [2022-03-15 15:51:04,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 894 transitions. [2022-03-15 15:51:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:04,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:04,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:04,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-03-15 15:51:04,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-15 15:51:04,750 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1204851922, now seen corresponding path program 274 times [2022-03-15 15:51:04,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:04,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86480010] [2022-03-15 15:51:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:04,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:04,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:04,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86480010] [2022-03-15 15:51:04,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86480010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:04,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819688635] [2022-03-15 15:51:04,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:04,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:04,933 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:04,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-15 15:51:04,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:05,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:05,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:51:05,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:05,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:05,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:05,681 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:05,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:51:05,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:51:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:05,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819688635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:05,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:05,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:51:05,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767445524] [2022-03-15 15:51:05,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:05,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:05,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:05,779 INFO L87 Difference]: Start difference. First operand 348 states and 894 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:06,283 INFO L93 Difference]: Finished difference Result 417 states and 1019 transitions. [2022-03-15 15:51:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:51:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:06,284 INFO L225 Difference]: With dead ends: 417 [2022-03-15 15:51:06,284 INFO L226 Difference]: Without dead ends: 400 [2022-03-15 15:51:06,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:51:06,284 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:06,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 257 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 623 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-15 15:51:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-15 15:51:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 348. [2022-03-15 15:51:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.5763688760806915) internal successors, (894), 347 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 894 transitions. [2022-03-15 15:51:06,288 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 894 transitions. Word has length 18 [2022-03-15 15:51:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:06,288 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 894 transitions. [2022-03-15 15:51:06,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 894 transitions. [2022-03-15 15:51:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:06,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:06,289 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:06,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:06,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-15 15:51:06,504 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash -18449286, now seen corresponding path program 275 times [2022-03-15 15:51:06,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:06,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363765165] [2022-03-15 15:51:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:06,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:06,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:06,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363765165] [2022-03-15 15:51:06,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363765165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:06,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191427225] [2022-03-15 15:51:06,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:06,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:06,658 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:06,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-15 15:51:06,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:06,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:06,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:06,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:06,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:06,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:06,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:06,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:06,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:07,311 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:07,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:51:07,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:51:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:07,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191427225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:07,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:07,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:51:07,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618673922] [2022-03-15 15:51:07,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:07,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:07,376 INFO L87 Difference]: Start difference. First operand 348 states and 894 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:08,527 INFO L93 Difference]: Finished difference Result 443 states and 1049 transitions. [2022-03-15 15:51:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:51:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:08,528 INFO L225 Difference]: With dead ends: 443 [2022-03-15 15:51:08,528 INFO L226 Difference]: Without dead ends: 403 [2022-03-15 15:51:08,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:51:08,529 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:08,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 248 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 630 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-03-15 15:51:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-15 15:51:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 352. [2022-03-15 15:51:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.5868945868945867) internal successors, (908), 351 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 908 transitions. [2022-03-15 15:51:08,533 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 908 transitions. Word has length 18 [2022-03-15 15:51:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:08,533 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 908 transitions. [2022-03-15 15:51:08,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 908 transitions. [2022-03-15 15:51:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:08,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:08,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:08,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-15 15:51:08,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-15 15:51:08,743 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1933623120, now seen corresponding path program 276 times [2022-03-15 15:51:08,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:08,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115644653] [2022-03-15 15:51:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:08,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:08,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115644653] [2022-03-15 15:51:08,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115644653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:08,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701070093] [2022-03-15 15:51:08,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:08,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:08,904 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:08,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-15 15:51:08,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:51:08,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:09,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:51:09,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:09,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:51:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:09,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:09,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:09,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 15:51:09,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:09,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 66 [2022-03-15 15:51:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:09,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701070093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:09,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:09,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:09,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963644872] [2022-03-15 15:51:09,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:09,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:09,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:09,815 INFO L87 Difference]: Start difference. First operand 352 states and 908 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:10,362 INFO L93 Difference]: Finished difference Result 426 states and 1053 transitions. [2022-03-15 15:51:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:51:10,362 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:10,363 INFO L225 Difference]: With dead ends: 426 [2022-03-15 15:51:10,363 INFO L226 Difference]: Without dead ends: 412 [2022-03-15 15:51:10,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:51:10,363 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:10,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 156 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 477 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-03-15 15:51:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-15 15:51:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 358. [2022-03-15 15:51:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.588235294117647) internal successors, (924), 357 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 924 transitions. [2022-03-15 15:51:10,367 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 924 transitions. Word has length 18 [2022-03-15 15:51:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:10,367 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 924 transitions. [2022-03-15 15:51:10,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 924 transitions. [2022-03-15 15:51:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:10,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:10,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:10,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:10,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:10,578 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash 241443838, now seen corresponding path program 277 times [2022-03-15 15:51:10,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:10,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725632694] [2022-03-15 15:51:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:10,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:10,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725632694] [2022-03-15 15:51:10,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725632694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:10,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737126813] [2022-03-15 15:51:10,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:10,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:10,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:10,730 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:10,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-15 15:51:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:10,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:10,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:10,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:51:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:10,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:11,266 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:11,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:51:11,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:51:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:11,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737126813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:11,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:11,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:51:11,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960784401] [2022-03-15 15:51:11,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:11,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:11,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:11,334 INFO L87 Difference]: Start difference. First operand 358 states and 924 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:11,807 INFO L93 Difference]: Finished difference Result 517 states and 1239 transitions. [2022-03-15 15:51:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:51:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:11,808 INFO L225 Difference]: With dead ends: 517 [2022-03-15 15:51:11,808 INFO L226 Difference]: Without dead ends: 500 [2022-03-15 15:51:11,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:51:11,809 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:11,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 394 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 885 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-03-15 15:51:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-03-15 15:51:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 375. [2022-03-15 15:51:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.6149732620320854) internal successors, (978), 374 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 978 transitions. [2022-03-15 15:51:11,813 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 978 transitions. Word has length 18 [2022-03-15 15:51:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 978 transitions. [2022-03-15 15:51:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 978 transitions. [2022-03-15 15:51:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:11,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:11,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:11,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-15 15:51:12,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-15 15:51:12,019 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2026262884, now seen corresponding path program 278 times [2022-03-15 15:51:12,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:12,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262215106] [2022-03-15 15:51:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:12,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:12,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262215106] [2022-03-15 15:51:12,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262215106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:12,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804338670] [2022-03-15 15:51:12,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:12,213 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:12,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-15 15:51:12,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:12,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:12,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:12,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:51:12,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:12,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:12,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:12,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:12,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 95 [2022-03-15 15:51:12,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:12,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 67 [2022-03-15 15:51:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:12,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804338670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:12,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:12,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:12,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572540946] [2022-03-15 15:51:12,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:12,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:12,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:12,795 INFO L87 Difference]: Start difference. First operand 375 states and 978 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:13,365 INFO L93 Difference]: Finished difference Result 436 states and 1090 transitions. [2022-03-15 15:51:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:51:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:13,366 INFO L225 Difference]: With dead ends: 436 [2022-03-15 15:51:13,366 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 15:51:13,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:51:13,367 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:13,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 170 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 667 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-03-15 15:51:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 15:51:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 378. [2022-03-15 15:51:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.6153846153846154) internal successors, (986), 377 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 986 transitions. [2022-03-15 15:51:13,371 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 986 transitions. Word has length 18 [2022-03-15 15:51:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:13,371 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 986 transitions. [2022-03-15 15:51:13,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 986 transitions. [2022-03-15 15:51:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:13,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:13,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:13,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:13,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:13,587 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 201303504, now seen corresponding path program 279 times [2022-03-15 15:51:13,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:13,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646887106] [2022-03-15 15:51:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:13,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:13,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646887106] [2022-03-15 15:51:13,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646887106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:13,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340517656] [2022-03-15 15:51:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:13,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:13,731 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:13,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-15 15:51:13,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:51:13,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:13,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:13,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:13,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:13,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:13,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:14,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:14,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 77 [2022-03-15 15:51:14,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:14,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-03-15 15:51:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340517656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:14,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:14,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:14,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157573162] [2022-03-15 15:51:14,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:14,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:14,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:14,334 INFO L87 Difference]: Start difference. First operand 378 states and 986 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:14,961 INFO L93 Difference]: Finished difference Result 433 states and 1081 transitions. [2022-03-15 15:51:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:51:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:14,962 INFO L225 Difference]: With dead ends: 433 [2022-03-15 15:51:14,962 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 15:51:14,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:51:14,962 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:14,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 146 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 674 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-03-15 15:51:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 15:51:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 374. [2022-03-15 15:51:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.60857908847185) internal successors, (973), 373 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 973 transitions. [2022-03-15 15:51:14,966 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 973 transitions. Word has length 18 [2022-03-15 15:51:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:14,966 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 973 transitions. [2022-03-15 15:51:14,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 973 transitions. [2022-03-15 15:51:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:14,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:14,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:14,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-15 15:51:15,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:15,184 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -368831486, now seen corresponding path program 280 times [2022-03-15 15:51:15,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:15,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404196164] [2022-03-15 15:51:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:15,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:15,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404196164] [2022-03-15 15:51:15,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404196164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:15,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228002795] [2022-03-15 15:51:15,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:15,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:15,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:15,369 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:15,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-15 15:51:15,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:15,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:15,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:15,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:15,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:15,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:15,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:15,994 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:15,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:51:15,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:51:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:16,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228002795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:16,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:16,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:16,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157858972] [2022-03-15 15:51:16,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:16,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:16,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:16,069 INFO L87 Difference]: Start difference. First operand 374 states and 973 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:17,608 INFO L93 Difference]: Finished difference Result 522 states and 1212 transitions. [2022-03-15 15:51:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:51:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:17,609 INFO L225 Difference]: With dead ends: 522 [2022-03-15 15:51:17,609 INFO L226 Difference]: Without dead ends: 482 [2022-03-15 15:51:17,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:51:17,610 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 98 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:17,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 395 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1055 Invalid, 0 Unknown, 6 Unchecked, 0.4s Time] [2022-03-15 15:51:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-03-15 15:51:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 377. [2022-03-15 15:51:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.6143617021276597) internal successors, (983), 376 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 983 transitions. [2022-03-15 15:51:17,614 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 983 transitions. Word has length 18 [2022-03-15 15:51:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 983 transitions. [2022-03-15 15:51:17,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 983 transitions. [2022-03-15 15:51:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:17,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:17,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:17,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:17,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:17,827 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1881146404, now seen corresponding path program 281 times [2022-03-15 15:51:17,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:17,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481383903] [2022-03-15 15:51:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:17,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:17,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481383903] [2022-03-15 15:51:17,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481383903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:17,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468786290] [2022-03-15 15:51:17,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:17,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:17,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:17,996 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:17,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-15 15:51:18,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:51:18,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:18,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:18,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:18,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:51:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:18,595 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:18,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 104 [2022-03-15 15:51:18,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-03-15 15:51:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:18,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468786290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:18,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:18,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:18,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360334573] [2022-03-15 15:51:18,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:18,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:18,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:18,669 INFO L87 Difference]: Start difference. First operand 377 states and 983 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:18,988 INFO L93 Difference]: Finished difference Result 513 states and 1245 transitions. [2022-03-15 15:51:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:51:18,988 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:18,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:18,989 INFO L225 Difference]: With dead ends: 513 [2022-03-15 15:51:18,989 INFO L226 Difference]: Without dead ends: 493 [2022-03-15 15:51:18,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:51:18,989 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:18,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 349 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 810 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-03-15 15:51:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-15 15:51:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 394. [2022-03-15 15:51:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.6412213740458017) internal successors, (1038), 393 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1038 transitions. [2022-03-15 15:51:18,995 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1038 transitions. Word has length 18 [2022-03-15 15:51:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:18,995 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1038 transitions. [2022-03-15 15:51:18,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1038 transitions. [2022-03-15 15:51:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:18,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:18,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:19,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-15 15:51:19,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:19,207 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash -186254504, now seen corresponding path program 282 times [2022-03-15 15:51:19,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:19,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486962873] [2022-03-15 15:51:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:19,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:19,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486962873] [2022-03-15 15:51:19,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486962873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:19,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288082891] [2022-03-15 15:51:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:19,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:19,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:19,421 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:19,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-15 15:51:19,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:51:19,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:19,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:19,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:19,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:19,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:19,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:19,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:19,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:19,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 78 [2022-03-15 15:51:19,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:19,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 58 [2022-03-15 15:51:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:20,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288082891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:20,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:20,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:20,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552118573] [2022-03-15 15:51:20,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:20,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:20,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:20,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:20,125 INFO L87 Difference]: Start difference. First operand 394 states and 1038 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:20,764 INFO L93 Difference]: Finished difference Result 510 states and 1248 transitions. [2022-03-15 15:51:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:51:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:20,765 INFO L225 Difference]: With dead ends: 510 [2022-03-15 15:51:20,765 INFO L226 Difference]: Without dead ends: 479 [2022-03-15 15:51:20,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:51:20,766 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:20,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 246 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 682 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-03-15 15:51:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-15 15:51:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 398. [2022-03-15 15:51:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.649874055415617) internal successors, (1052), 397 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1052 transitions. [2022-03-15 15:51:20,770 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1052 transitions. Word has length 18 [2022-03-15 15:51:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1052 transitions. [2022-03-15 15:51:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1052 transitions. [2022-03-15 15:51:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:20,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:20,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:20,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-03-15 15:51:20,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-15 15:51:20,987 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1962542032, now seen corresponding path program 283 times [2022-03-15 15:51:20,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:20,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265700711] [2022-03-15 15:51:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:21,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265700711] [2022-03-15 15:51:21,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265700711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:21,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201043366] [2022-03-15 15:51:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:21,147 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:21,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-15 15:51:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:21,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:21,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:21,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:21,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:21,804 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:21,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:51:21,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:51:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:21,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201043366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:21,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:21,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:21,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406255264] [2022-03-15 15:51:21,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:21,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:21,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:21,904 INFO L87 Difference]: Start difference. First operand 398 states and 1052 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:23,582 INFO L93 Difference]: Finished difference Result 617 states and 1414 transitions. [2022-03-15 15:51:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:51:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:23,583 INFO L225 Difference]: With dead ends: 617 [2022-03-15 15:51:23,583 INFO L226 Difference]: Without dead ends: 570 [2022-03-15 15:51:23,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=2237, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:51:23,583 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:23,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 427 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:51:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-15 15:51:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 407. [2022-03-15 15:51:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.667487684729064) internal successors, (1083), 406 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1083 transitions. [2022-03-15 15:51:23,588 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1083 transitions. Word has length 18 [2022-03-15 15:51:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:23,588 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1083 transitions. [2022-03-15 15:51:23,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1083 transitions. [2022-03-15 15:51:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:23,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:23,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:23,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:23,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-15 15:51:23,799 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash -144242088, now seen corresponding path program 284 times [2022-03-15 15:51:23,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:23,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748959463] [2022-03-15 15:51:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:23,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:24,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748959463] [2022-03-15 15:51:24,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748959463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:24,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461853792] [2022-03-15 15:51:24,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:24,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:24,021 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:24,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-15 15:51:24,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:24,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:24,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:24,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:24,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:24,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:24,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:24,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:51:24,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:24,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:51:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461853792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:24,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:24,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:24,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047376929] [2022-03-15 15:51:24,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:24,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:24,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:24,679 INFO L87 Difference]: Start difference. First operand 407 states and 1083 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:25,247 INFO L93 Difference]: Finished difference Result 487 states and 1222 transitions. [2022-03-15 15:51:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:51:25,247 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:25,248 INFO L225 Difference]: With dead ends: 487 [2022-03-15 15:51:25,248 INFO L226 Difference]: Without dead ends: 466 [2022-03-15 15:51:25,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:51:25,248 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:25,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 238 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:51:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-15 15:51:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 409. [2022-03-15 15:51:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.6691176470588234) internal successors, (1089), 408 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1089 transitions. [2022-03-15 15:51:25,253 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1089 transitions. Word has length 18 [2022-03-15 15:51:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:25,253 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1089 transitions. [2022-03-15 15:51:25,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1089 transitions. [2022-03-15 15:51:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:25,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:25,253 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:25,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-15 15:51:25,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-15 15:51:25,466 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1030040368, now seen corresponding path program 285 times [2022-03-15 15:51:25,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:25,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976079448] [2022-03-15 15:51:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:25,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:25,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:25,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976079448] [2022-03-15 15:51:25,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976079448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:25,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251021060] [2022-03-15 15:51:25,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:25,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:25,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:25,711 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-15 15:51:25,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:51:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:25,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:25,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:25,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:25,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:26,323 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:26,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:51:26,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:51:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:26,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251021060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:26,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:26,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:51:26,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880177409] [2022-03-15 15:51:26,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:26,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:51:26,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:51:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:51:26,403 INFO L87 Difference]: Start difference. First operand 409 states and 1089 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:28,268 INFO L93 Difference]: Finished difference Result 682 states and 1549 transitions. [2022-03-15 15:51:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:51:28,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:28,269 INFO L225 Difference]: With dead ends: 682 [2022-03-15 15:51:28,269 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 15:51:28,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=309, Invalid=2553, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:51:28,270 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 139 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:28,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 537 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:51:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 15:51:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 418. [2022-03-15 15:51:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.6690647482014387) internal successors, (1113), 417 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1113 transitions. [2022-03-15 15:51:28,275 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1113 transitions. Word has length 18 [2022-03-15 15:51:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:28,275 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1113 transitions. [2022-03-15 15:51:28,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1113 transitions. [2022-03-15 15:51:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:28,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:28,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:28,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-15 15:51:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-03-15 15:51:28,491 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash -216975332, now seen corresponding path program 286 times [2022-03-15 15:51:28,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:28,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595985464] [2022-03-15 15:51:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:28,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:28,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:28,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595985464] [2022-03-15 15:51:28,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595985464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:28,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844868601] [2022-03-15 15:51:28,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:28,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:28,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:28,613 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:28,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-15 15:51:28,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:28,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:28,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:28,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:28,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:51:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:28,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:29,114 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:29,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:51:29,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:51:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:29,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844868601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:29,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:29,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:51:29,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915538402] [2022-03-15 15:51:29,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:29,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:51:29,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:29,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:51:29,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:51:29,173 INFO L87 Difference]: Start difference. First operand 418 states and 1113 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:29,759 INFO L93 Difference]: Finished difference Result 614 states and 1485 transitions. [2022-03-15 15:51:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:51:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:29,761 INFO L225 Difference]: With dead ends: 614 [2022-03-15 15:51:29,761 INFO L226 Difference]: Without dead ends: 588 [2022-03-15 15:51:29,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:51:29,761 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 453 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:51:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-15 15:51:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 439. [2022-03-15 15:51:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.7009132420091326) internal successors, (1183), 438 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1183 transitions. [2022-03-15 15:51:29,766 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1183 transitions. Word has length 18 [2022-03-15 15:51:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1183 transitions. [2022-03-15 15:51:29,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1183 transitions. [2022-03-15 15:51:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:29,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:29,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:29,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-15 15:51:29,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:29,975 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1580610128, now seen corresponding path program 287 times [2022-03-15 15:51:29,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:29,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181521746] [2022-03-15 15:51:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:30,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181521746] [2022-03-15 15:51:30,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181521746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:30,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894014247] [2022-03-15 15:51:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:30,151 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:30,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-15 15:51:30,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:30,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:30,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:30,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:30,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:30,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 15:51:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:30,700 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:30,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:51:30,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:51:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894014247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:30,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:30,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:51:30,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135860634] [2022-03-15 15:51:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:51:30,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:51:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:51:30,760 INFO L87 Difference]: Start difference. First operand 439 states and 1183 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:31,421 INFO L93 Difference]: Finished difference Result 653 states and 1543 transitions. [2022-03-15 15:51:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:51:31,421 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:31,422 INFO L225 Difference]: With dead ends: 653 [2022-03-15 15:51:31,422 INFO L226 Difference]: Without dead ends: 623 [2022-03-15 15:51:31,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:51:31,422 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:31,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 470 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:51:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-03-15 15:51:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2022-03-15 15:51:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.706546275395034) internal successors, (1199), 443 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1199 transitions. [2022-03-15 15:51:31,427 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1199 transitions. Word has length 18 [2022-03-15 15:51:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:31,428 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1199 transitions. [2022-03-15 15:51:31,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1199 transitions. [2022-03-15 15:51:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:31,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:31,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:31,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:31,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-15 15:51:31,644 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1915691420, now seen corresponding path program 288 times [2022-03-15 15:51:31,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:31,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275879427] [2022-03-15 15:51:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:31,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:31,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275879427] [2022-03-15 15:51:31,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275879427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:31,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315901516] [2022-03-15 15:51:31,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:31,846 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:31,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-15 15:51:31,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:31,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:31,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:32,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:32,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:32,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:32,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-15 15:51:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:32,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:32,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:32,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:51:32,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:32,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:51:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:32,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315901516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:32,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:32,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:51:32,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761458117] [2022-03-15 15:51:32,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:32,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:51:32,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:51:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:51:32,883 INFO L87 Difference]: Start difference. First operand 444 states and 1199 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:33,681 INFO L93 Difference]: Finished difference Result 555 states and 1398 transitions. [2022-03-15 15:51:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:51:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:33,682 INFO L225 Difference]: With dead ends: 555 [2022-03-15 15:51:33,682 INFO L226 Difference]: Without dead ends: 546 [2022-03-15 15:51:33,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:51:33,683 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:33,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 308 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 852 Invalid, 0 Unknown, 135 Unchecked, 0.4s Time] [2022-03-15 15:51:33,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-15 15:51:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 456. [2022-03-15 15:51:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.7120879120879122) internal successors, (1234), 455 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1234 transitions. [2022-03-15 15:51:33,688 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1234 transitions. Word has length 18 [2022-03-15 15:51:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:33,688 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1234 transitions. [2022-03-15 15:51:33,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1234 transitions. [2022-03-15 15:51:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:33,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:33,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:33,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-03-15 15:51:33,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:33,891 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 198537006, now seen corresponding path program 289 times [2022-03-15 15:51:33,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:33,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500819917] [2022-03-15 15:51:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:34,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:34,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500819917] [2022-03-15 15:51:34,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500819917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:34,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258140927] [2022-03-15 15:51:34,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:34,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:34,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:34,089 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:34,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-15 15:51:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:34,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:34,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:34,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:34,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:51:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:34,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:34,921 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:34,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:51:34,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:51:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:35,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258140927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:35,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:35,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:51:35,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299385632] [2022-03-15 15:51:35,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:35,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:51:35,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:51:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:51:35,006 INFO L87 Difference]: Start difference. First operand 456 states and 1234 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:35,959 INFO L93 Difference]: Finished difference Result 682 states and 1621 transitions. [2022-03-15 15:51:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:51:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:35,961 INFO L225 Difference]: With dead ends: 682 [2022-03-15 15:51:35,961 INFO L226 Difference]: Without dead ends: 648 [2022-03-15 15:51:35,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:51:35,961 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 85 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:35,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 597 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:51:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-15 15:51:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 440. [2022-03-15 15:51:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.710706150341686) internal successors, (1190), 439 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1190 transitions. [2022-03-15 15:51:35,969 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1190 transitions. Word has length 18 [2022-03-15 15:51:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:35,969 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1190 transitions. [2022-03-15 15:51:35,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1190 transitions. [2022-03-15 15:51:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:35,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:35,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:35,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-03-15 15:51:36,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:36,172 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -151709488, now seen corresponding path program 290 times [2022-03-15 15:51:36,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:36,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240895790] [2022-03-15 15:51:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:36,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:36,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240895790] [2022-03-15 15:51:36,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240895790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:36,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319199462] [2022-03-15 15:51:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:36,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:36,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:36,355 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:36,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-15 15:51:36,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:36,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:36,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:36,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:36,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:36,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:36,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:37,055 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:37,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:51:37,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:51:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:37,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319199462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:37,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:37,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:37,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260242584] [2022-03-15 15:51:37,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:37,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:37,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:37,120 INFO L87 Difference]: Start difference. First operand 440 states and 1190 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:38,789 INFO L93 Difference]: Finished difference Result 725 states and 1652 transitions. [2022-03-15 15:51:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:51:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:38,790 INFO L225 Difference]: With dead ends: 725 [2022-03-15 15:51:38,790 INFO L226 Difference]: Without dead ends: 678 [2022-03-15 15:51:38,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:51:38,790 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 128 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:38,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 393 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:51:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-03-15 15:51:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 435. [2022-03-15 15:51:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.707373271889401) internal successors, (1175), 434 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1175 transitions. [2022-03-15 15:51:38,796 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1175 transitions. Word has length 18 [2022-03-15 15:51:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:38,796 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1175 transitions. [2022-03-15 15:51:38,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1175 transitions. [2022-03-15 15:51:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:38,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:38,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:38,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:39,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:39,014 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash 499141362, now seen corresponding path program 291 times [2022-03-15 15:51:39,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:39,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233334896] [2022-03-15 15:51:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:39,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233334896] [2022-03-15 15:51:39,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233334896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:39,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194083228] [2022-03-15 15:51:39,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:39,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:39,168 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:39,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-15 15:51:39,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:39,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:39,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:39,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:39,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:39,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:39,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:39,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:51:39,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:39,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:51:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194083228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:39,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:39,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:39,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968650752] [2022-03-15 15:51:39,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:39,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:39,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:39,789 INFO L87 Difference]: Start difference. First operand 435 states and 1175 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:40,243 INFO L93 Difference]: Finished difference Result 517 states and 1322 transitions. [2022-03-15 15:51:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:51:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:40,244 INFO L225 Difference]: With dead ends: 517 [2022-03-15 15:51:40,244 INFO L226 Difference]: Without dead ends: 503 [2022-03-15 15:51:40,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:51:40,245 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:40,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 185 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:51:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-03-15 15:51:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 441. [2022-03-15 15:51:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.715909090909091) internal successors, (1195), 440 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1195 transitions. [2022-03-15 15:51:40,249 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1195 transitions. Word has length 18 [2022-03-15 15:51:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:40,250 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1195 transitions. [2022-03-15 15:51:40,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1195 transitions. [2022-03-15 15:51:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:40,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:40,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:40,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-15 15:51:40,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:40,466 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1607642758, now seen corresponding path program 292 times [2022-03-15 15:51:40,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:40,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890654839] [2022-03-15 15:51:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:40,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:40,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:40,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890654839] [2022-03-15 15:51:40,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890654839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:40,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452366175] [2022-03-15 15:51:40,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:40,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:40,697 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:40,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-15 15:51:40,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:40,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:40,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:40,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:40,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:40,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:41,373 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:41,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:51:41,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:51:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:41,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452366175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:41,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:41,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:41,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144427431] [2022-03-15 15:51:41,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:41,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:41,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:41,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:41,484 INFO L87 Difference]: Start difference. First operand 441 states and 1195 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:43,313 INFO L93 Difference]: Finished difference Result 658 states and 1558 transitions. [2022-03-15 15:51:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:51:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:43,315 INFO L225 Difference]: With dead ends: 658 [2022-03-15 15:51:43,315 INFO L226 Difference]: Without dead ends: 609 [2022-03-15 15:51:43,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:51:43,315 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:43,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 459 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:51:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-15 15:51:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 447. [2022-03-15 15:51:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.7219730941704037) internal successors, (1214), 446 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1214 transitions. [2022-03-15 15:51:43,320 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1214 transitions. Word has length 18 [2022-03-15 15:51:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:43,320 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1214 transitions. [2022-03-15 15:51:43,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1214 transitions. [2022-03-15 15:51:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:43,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:43,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:43,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-03-15 15:51:43,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:43,531 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash -995495352, now seen corresponding path program 293 times [2022-03-15 15:51:43,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:43,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123535645] [2022-03-15 15:51:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:43,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:43,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123535645] [2022-03-15 15:51:43,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123535645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:43,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389934715] [2022-03-15 15:51:43,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:43,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:43,755 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:43,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-15 15:51:43,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:51:43,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:43,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:43,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:44,366 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:44,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 15:51:44,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 15:51:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389934715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:44,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:44,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:44,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423383315] [2022-03-15 15:51:44,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:44,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:44,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:44,441 INFO L87 Difference]: Start difference. First operand 447 states and 1214 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:45,294 INFO L93 Difference]: Finished difference Result 595 states and 1466 transitions. [2022-03-15 15:51:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:51:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:45,295 INFO L225 Difference]: With dead ends: 595 [2022-03-15 15:51:45,295 INFO L226 Difference]: Without dead ends: 562 [2022-03-15 15:51:45,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:51:45,295 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:45,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 364 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 960 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-03-15 15:51:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-03-15 15:51:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 447. [2022-03-15 15:51:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.719730941704036) internal successors, (1213), 446 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1213 transitions. [2022-03-15 15:51:45,301 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1213 transitions. Word has length 18 [2022-03-15 15:51:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:45,301 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1213 transitions. [2022-03-15 15:51:45,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1213 transitions. [2022-03-15 15:51:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:45,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:45,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:45,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-03-15 15:51:45,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:45,517 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash -30301028, now seen corresponding path program 294 times [2022-03-15 15:51:45,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:45,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467483939] [2022-03-15 15:51:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:45,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:45,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467483939] [2022-03-15 15:51:45,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467483939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:45,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080801245] [2022-03-15 15:51:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:45,692 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-15 15:51:45,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:51:45,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:45,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:51:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:45,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:51:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:45,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:46,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:46,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2022-03-15 15:51:46,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:46,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 51 [2022-03-15 15:51:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:46,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080801245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:46,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:46,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:51:46,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538688761] [2022-03-15 15:51:46,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:46,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:46,332 INFO L87 Difference]: Start difference. First operand 447 states and 1213 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:46,627 INFO L93 Difference]: Finished difference Result 518 states and 1341 transitions. [2022-03-15 15:51:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:51:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:46,628 INFO L225 Difference]: With dead ends: 518 [2022-03-15 15:51:46,628 INFO L226 Difference]: Without dead ends: 504 [2022-03-15 15:51:46,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:51:46,628 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:46,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 199 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 575 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-15 15:51:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-15 15:51:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 451. [2022-03-15 15:51:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.7288888888888887) internal successors, (1228), 450 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1228 transitions. [2022-03-15 15:51:46,633 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1228 transitions. Word has length 18 [2022-03-15 15:51:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:46,633 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 1228 transitions. [2022-03-15 15:51:46,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1228 transitions. [2022-03-15 15:51:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:46,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:46,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:46,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-03-15 15:51:46,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-15 15:51:46,839 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:46,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1148789126, now seen corresponding path program 295 times [2022-03-15 15:51:46,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:46,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140155945] [2022-03-15 15:51:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:46,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:47,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:47,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140155945] [2022-03-15 15:51:47,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140155945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:47,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62012651] [2022-03-15 15:51:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:47,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:47,029 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:47,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-15 15:51:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:47,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:47,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:47,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:47,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:47,592 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:47,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 93 [2022-03-15 15:51:47,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 70 [2022-03-15 15:51:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:51:47,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62012651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:47,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:47,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 27 [2022-03-15 15:51:47,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479776272] [2022-03-15 15:51:47,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:47,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:51:47,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:51:47,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:51:47,673 INFO L87 Difference]: Start difference. First operand 451 states and 1228 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:48,176 INFO L93 Difference]: Finished difference Result 520 states and 1359 transitions. [2022-03-15 15:51:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:51:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:48,177 INFO L225 Difference]: With dead ends: 520 [2022-03-15 15:51:48,177 INFO L226 Difference]: Without dead ends: 504 [2022-03-15 15:51:48,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:51:48,177 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:48,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 142 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-03-15 15:51:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-15 15:51:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 454. [2022-03-15 15:51:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.7373068432671084) internal successors, (1240), 453 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1240 transitions. [2022-03-15 15:51:48,182 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1240 transitions. Word has length 18 [2022-03-15 15:51:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:48,182 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1240 transitions. [2022-03-15 15:51:48,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1240 transitions. [2022-03-15 15:51:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:48,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:48,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:48,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:48,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-15 15:51:48,383 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash 642335132, now seen corresponding path program 296 times [2022-03-15 15:51:48,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:48,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583671441] [2022-03-15 15:51:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:48,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:48,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:48,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583671441] [2022-03-15 15:51:48,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583671441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:48,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442319290] [2022-03-15 15:51:48,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:48,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:48,558 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:48,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-15 15:51:48,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:48,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:48,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:48,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:48,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:48,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:51:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:48,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:49,157 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:49,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:51:49,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:51:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:49,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442319290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:49,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:49,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:49,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796265187] [2022-03-15 15:51:49,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:49,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:49,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:49,268 INFO L87 Difference]: Start difference. First operand 454 states and 1240 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:50,092 INFO L93 Difference]: Finished difference Result 595 states and 1511 transitions. [2022-03-15 15:51:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:51:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:50,093 INFO L225 Difference]: With dead ends: 595 [2022-03-15 15:51:50,093 INFO L226 Difference]: Without dead ends: 568 [2022-03-15 15:51:50,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:51:50,093 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:50,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 228 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:51:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-03-15 15:51:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 470. [2022-03-15 15:51:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.7505330490405115) internal successors, (1290), 469 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1290 transitions. [2022-03-15 15:51:50,098 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1290 transitions. Word has length 18 [2022-03-15 15:51:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:50,099 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1290 transitions. [2022-03-15 15:51:50,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1290 transitions. [2022-03-15 15:51:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:50,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:50,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:50,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-15 15:51:50,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-15 15:51:50,300 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1425065776, now seen corresponding path program 297 times [2022-03-15 15:51:50,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:50,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695187677] [2022-03-15 15:51:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:50,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:50,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:50,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695187677] [2022-03-15 15:51:50,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695187677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:50,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728005813] [2022-03-15 15:51:50,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:50,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:50,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:50,469 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:50,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-15 15:51:50,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:51:50,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:50,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:50,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:50,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:50,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:50,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:51,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:51,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:51:51,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:51,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:51:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:51,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728005813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:51,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:51,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:51:51,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911120942] [2022-03-15 15:51:51,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:51,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:51,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:51,152 INFO L87 Difference]: Start difference. First operand 470 states and 1290 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:51,609 INFO L93 Difference]: Finished difference Result 553 states and 1444 transitions. [2022-03-15 15:51:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:51:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:51,610 INFO L225 Difference]: With dead ends: 553 [2022-03-15 15:51:51,610 INFO L226 Difference]: Without dead ends: 539 [2022-03-15 15:51:51,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:51:51,610 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:51,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 206 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:51:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-03-15 15:51:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 475. [2022-03-15 15:51:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 2.7552742616033754) internal successors, (1306), 474 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1306 transitions. [2022-03-15 15:51:51,615 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1306 transitions. Word has length 18 [2022-03-15 15:51:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:51,616 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1306 transitions. [2022-03-15 15:51:51,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1306 transitions. [2022-03-15 15:51:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:51,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:51,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:51,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:51,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:51,832 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash 723730760, now seen corresponding path program 298 times [2022-03-15 15:51:51,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:51,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002081341] [2022-03-15 15:51:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:51,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:51,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:51,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002081341] [2022-03-15 15:51:51,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002081341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:51,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741728063] [2022-03-15 15:51:51,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:51,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:51,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:51,990 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:51,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-15 15:51:52,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:52,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:52,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:52,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:52,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:52,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:52,567 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:52,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:51:52,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:51:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:51:52,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741728063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:52,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:52,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:51:52,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060426133] [2022-03-15 15:51:52,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:52,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:52,657 INFO L87 Difference]: Start difference. First operand 475 states and 1306 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:54,218 INFO L93 Difference]: Finished difference Result 639 states and 1575 transitions. [2022-03-15 15:51:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:51:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:54,219 INFO L225 Difference]: With dead ends: 639 [2022-03-15 15:51:54,219 INFO L226 Difference]: Without dead ends: 599 [2022-03-15 15:51:54,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:51:54,219 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:54,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 299 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 882 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-03-15 15:51:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-15 15:51:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 477. [2022-03-15 15:51:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.7563025210084033) internal successors, (1312), 476 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1312 transitions. [2022-03-15 15:51:54,225 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1312 transitions. Word has length 18 [2022-03-15 15:51:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:54,225 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1312 transitions. [2022-03-15 15:51:54,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1312 transitions. [2022-03-15 15:51:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:54,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:54,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:54,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:54,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:54,426 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1688925084, now seen corresponding path program 299 times [2022-03-15 15:51:54,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:54,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53802744] [2022-03-15 15:51:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:54,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:54,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53802744] [2022-03-15 15:51:54,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53802744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:54,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701750750] [2022-03-15 15:51:54,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:54,596 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:54,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-15 15:51:54,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:51:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:54,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:54,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:51:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:54,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:54,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:55,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:55,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2022-03-15 15:51:55,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:55,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 51 [2022-03-15 15:51:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:55,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701750750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:55,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:55,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:51:55,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310345887] [2022-03-15 15:51:55,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:55,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:55,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:55,324 INFO L87 Difference]: Start difference. First operand 477 states and 1312 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:56,054 INFO L93 Difference]: Finished difference Result 530 states and 1394 transitions. [2022-03-15 15:51:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:51:56,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:56,055 INFO L225 Difference]: With dead ends: 530 [2022-03-15 15:51:56,055 INFO L226 Difference]: Without dead ends: 508 [2022-03-15 15:51:56,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:51:56,055 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:56,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 162 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 561 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-15 15:51:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-03-15 15:51:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 478. [2022-03-15 15:51:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.752620545073375) internal successors, (1313), 477 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1313 transitions. [2022-03-15 15:51:56,061 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1313 transitions. Word has length 18 [2022-03-15 15:51:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1313 transitions. [2022-03-15 15:51:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1313 transitions. [2022-03-15 15:51:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:56,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:56,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:56,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:56,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:56,271 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1383053360, now seen corresponding path program 300 times [2022-03-15 15:51:56,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:56,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040599527] [2022-03-15 15:51:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:56,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:56,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040599527] [2022-03-15 15:51:56,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040599527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:56,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914882436] [2022-03-15 15:51:56,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:56,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:56,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:56,466 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:56,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-15 15:51:56,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:51:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:56,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:51:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:56,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:51:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:56,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:57,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:57,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 76 [2022-03-15 15:51:57,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:57,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 52 [2022-03-15 15:51:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:57,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914882436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:57,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:57,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:51:57,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510205357] [2022-03-15 15:51:57,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:57,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:51:57,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:51:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:51:57,225 INFO L87 Difference]: Start difference. First operand 478 states and 1313 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:58,071 INFO L93 Difference]: Finished difference Result 547 states and 1449 transitions. [2022-03-15 15:51:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:51:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:58,072 INFO L225 Difference]: With dead ends: 547 [2022-03-15 15:51:58,072 INFO L226 Difference]: Without dead ends: 529 [2022-03-15 15:51:58,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:51:58,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:58,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 202 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 743 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-03-15 15:51:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-15 15:51:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 482. [2022-03-15 15:51:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.760914760914761) internal successors, (1328), 481 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1328 transitions. [2022-03-15 15:51:58,077 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1328 transitions. Word has length 18 [2022-03-15 15:51:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:58,077 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1328 transitions. [2022-03-15 15:51:58,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1328 transitions. [2022-03-15 15:51:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:58,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:58,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:58,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:58,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:58,294 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash -417859036, now seen corresponding path program 301 times [2022-03-15 15:51:58,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:58,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471628266] [2022-03-15 15:51:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:58,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471628266] [2022-03-15 15:51:58,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471628266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:58,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919413317] [2022-03-15 15:51:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:58,496 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:58,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-15 15:51:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:51:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:58,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:58,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:51:58,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:58,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:51:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:59,130 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:51:59,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:51:59,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:51:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:59,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919413317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:59,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:59,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:51:59,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478586604] [2022-03-15 15:51:59,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:59,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:51:59,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:51:59,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:51:59,198 INFO L87 Difference]: Start difference. First operand 482 states and 1328 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:59,628 INFO L93 Difference]: Finished difference Result 622 states and 1570 transitions. [2022-03-15 15:51:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:51:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:51:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:59,629 INFO L225 Difference]: With dead ends: 622 [2022-03-15 15:51:59,629 INFO L226 Difference]: Without dead ends: 597 [2022-03-15 15:51:59,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:51:59,630 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:59,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 328 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 813 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-15 15:51:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-03-15 15:51:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 481. [2022-03-15 15:51:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.7583333333333333) internal successors, (1324), 480 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1324 transitions. [2022-03-15 15:51:59,635 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1324 transitions. Word has length 18 [2022-03-15 15:51:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:59,635 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1324 transitions. [2022-03-15 15:51:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1324 transitions. [2022-03-15 15:51:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:51:59,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:59,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:59,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:59,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:59,852 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -953088838, now seen corresponding path program 302 times [2022-03-15 15:51:59,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:59,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798192044] [2022-03-15 15:51:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:59,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:59,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798192044] [2022-03-15 15:51:59,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798192044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:59,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408905582] [2022-03-15 15:51:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:59,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:59,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:59,974 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:51:59,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-15 15:52:00,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:00,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:00,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:00,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:00,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:00,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:00,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:00,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:52:00,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:00,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:52:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:00,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408905582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:00,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:00,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:52:00,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624117739] [2022-03-15 15:52:00,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:00,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:00,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:00,576 INFO L87 Difference]: Start difference. First operand 481 states and 1324 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:00,946 INFO L93 Difference]: Finished difference Result 537 states and 1427 transitions. [2022-03-15 15:52:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:52:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:00,947 INFO L225 Difference]: With dead ends: 537 [2022-03-15 15:52:00,947 INFO L226 Difference]: Without dead ends: 530 [2022-03-15 15:52:00,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:52:00,947 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:00,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 176 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 539 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-03-15 15:52:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-03-15 15:52:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 481. [2022-03-15 15:52:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.7583333333333333) internal successors, (1324), 480 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1324 transitions. [2022-03-15 15:52:00,953 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1324 transitions. Word has length 18 [2022-03-15 15:52:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:00,953 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1324 transitions. [2022-03-15 15:52:00,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1324 transitions. [2022-03-15 15:52:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:00,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:00,953 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:00,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-15 15:52:01,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-03-15 15:52:01,169 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1843753528, now seen corresponding path program 303 times [2022-03-15 15:52:01,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:01,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006258387] [2022-03-15 15:52:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:01,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:01,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006258387] [2022-03-15 15:52:01,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006258387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:01,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59252399] [2022-03-15 15:52:01,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:01,342 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:01,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-15 15:52:01,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:01,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:01,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:01,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:01,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:01,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:01,790 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:01,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:52:01,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:52:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59252399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:01,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:01,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:52:01,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054925096] [2022-03-15 15:52:01,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:01,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:01,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:01,855 INFO L87 Difference]: Start difference. First operand 481 states and 1324 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:02,427 INFO L93 Difference]: Finished difference Result 662 states and 1659 transitions. [2022-03-15 15:52:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:52:02,428 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:02,428 INFO L225 Difference]: With dead ends: 662 [2022-03-15 15:52:02,428 INFO L226 Difference]: Without dead ends: 639 [2022-03-15 15:52:02,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:52:02,429 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:02,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 374 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-15 15:52:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 486. [2022-03-15 15:52:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.7628865979381443) internal successors, (1340), 485 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1340 transitions. [2022-03-15 15:52:02,434 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1340 transitions. Word has length 18 [2022-03-15 15:52:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:02,434 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1340 transitions. [2022-03-15 15:52:02,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1340 transitions. [2022-03-15 15:52:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:02,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:02,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:02,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-15 15:52:02,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:02,651 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1508672236, now seen corresponding path program 304 times [2022-03-15 15:52:02,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:02,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42458938] [2022-03-15 15:52:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:02,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:02,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42458938] [2022-03-15 15:52:02,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42458938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:02,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122729074] [2022-03-15 15:52:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:02,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:02,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:02,847 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:02,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-15 15:52:02,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:02,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:02,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:02,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:02,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:02,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:02,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:03,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:03,316 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:03,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:52:03,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:52:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:03,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122729074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:03,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:03,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:52:03,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524758092] [2022-03-15 15:52:03,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:03,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:03,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:03,382 INFO L87 Difference]: Start difference. First operand 486 states and 1340 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:04,096 INFO L93 Difference]: Finished difference Result 684 states and 1691 transitions. [2022-03-15 15:52:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:52:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:04,098 INFO L225 Difference]: With dead ends: 684 [2022-03-15 15:52:04,098 INFO L226 Difference]: Without dead ends: 658 [2022-03-15 15:52:04,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:52:04,098 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:04,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 432 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:52:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-15 15:52:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 488. [2022-03-15 15:52:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.759753593429158) internal successors, (1344), 487 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1344 transitions. [2022-03-15 15:52:04,104 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1344 transitions. Word has length 18 [2022-03-15 15:52:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:04,104 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1344 transitions. [2022-03-15 15:52:04,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1344 transitions. [2022-03-15 15:52:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:04,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:04,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:04,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:04,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-03-15 15:52:04,321 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:04,321 INFO L85 PathProgramCache]: Analyzing trace with hash 718894152, now seen corresponding path program 305 times [2022-03-15 15:52:04,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:04,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927789462] [2022-03-15 15:52:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:04,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:04,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927789462] [2022-03-15 15:52:04,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927789462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:04,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994325762] [2022-03-15 15:52:04,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:04,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:04,497 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:04,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-15 15:52:04,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:04,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:04,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:04,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:05,371 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:05,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 15:52:05,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 15:52:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:05,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994325762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:05,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:05,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-03-15 15:52:05,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262543463] [2022-03-15 15:52:05,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:05,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:05,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:05,453 INFO L87 Difference]: Start difference. First operand 488 states and 1344 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:06,658 INFO L93 Difference]: Finished difference Result 762 states and 1820 transitions. [2022-03-15 15:52:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:52:06,658 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:06,659 INFO L225 Difference]: With dead ends: 762 [2022-03-15 15:52:06,659 INFO L226 Difference]: Without dead ends: 713 [2022-03-15 15:52:06,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:52:06,660 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:06,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 370 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:52:06,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-15 15:52:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 485. [2022-03-15 15:52:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.7520661157024793) internal successors, (1332), 484 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1332 transitions. [2022-03-15 15:52:06,666 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1332 transitions. Word has length 18 [2022-03-15 15:52:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:06,666 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1332 transitions. [2022-03-15 15:52:06,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1332 transitions. [2022-03-15 15:52:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:06,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:06,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:06,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-15 15:52:06,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-15 15:52:06,869 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash 148759162, now seen corresponding path program 306 times [2022-03-15 15:52:06,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:06,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829720331] [2022-03-15 15:52:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:07,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829720331] [2022-03-15 15:52:07,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829720331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:07,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728920346] [2022-03-15 15:52:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:07,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:07,074 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-15 15:52:07,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:07,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:07,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:07,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:07,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:07,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-15 15:52:07,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:07,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2022-03-15 15:52:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728920346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:07,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:07,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:52:07,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451276533] [2022-03-15 15:52:07,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:07,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:07,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:07,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:07,849 INFO L87 Difference]: Start difference. First operand 485 states and 1332 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:08,929 INFO L93 Difference]: Finished difference Result 609 states and 1553 transitions. [2022-03-15 15:52:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:52:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:08,930 INFO L225 Difference]: With dead ends: 609 [2022-03-15 15:52:08,930 INFO L226 Difference]: Without dead ends: 578 [2022-03-15 15:52:08,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:52:08,930 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:08,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 209 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-03-15 15:52:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 492. [2022-03-15 15:52:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.7637474541751526) internal successors, (1357), 491 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1357 transitions. [2022-03-15 15:52:08,936 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1357 transitions. Word has length 18 [2022-03-15 15:52:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:08,936 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1357 transitions. [2022-03-15 15:52:08,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1357 transitions. [2022-03-15 15:52:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:08,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:08,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:08,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:09,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-15 15:52:09,152 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1997411598, now seen corresponding path program 307 times [2022-03-15 15:52:09,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:09,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126494240] [2022-03-15 15:52:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:09,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:09,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126494240] [2022-03-15 15:52:09,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126494240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:09,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781751946] [2022-03-15 15:52:09,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:09,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:09,334 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:09,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-15 15:52:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:09,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:09,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:09,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:09,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:09,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:10,010 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:10,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 85 [2022-03-15 15:52:10,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 62 [2022-03-15 15:52:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:10,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781751946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:10,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:10,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:52:10,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970095328] [2022-03-15 15:52:10,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:10,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:10,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:10,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:10,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:10,098 INFO L87 Difference]: Start difference. First operand 492 states and 1357 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:11,466 INFO L93 Difference]: Finished difference Result 670 states and 1650 transitions. [2022-03-15 15:52:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:52:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:11,467 INFO L225 Difference]: With dead ends: 670 [2022-03-15 15:52:11,467 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 15:52:11,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:52:11,467 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 108 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:11,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 378 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 998 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-03-15 15:52:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 15:52:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 495. [2022-03-15 15:52:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.763157894736842) internal successors, (1365), 494 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1365 transitions. [2022-03-15 15:52:11,473 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1365 transitions. Word has length 18 [2022-03-15 15:52:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:11,473 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1365 transitions. [2022-03-15 15:52:11,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1365 transitions. [2022-03-15 15:52:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:11,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:11,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:11,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-03-15 15:52:11,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-15 15:52:11,688 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1896230244, now seen corresponding path program 308 times [2022-03-15 15:52:11,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:11,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7151138] [2022-03-15 15:52:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:11,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:11,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7151138] [2022-03-15 15:52:11,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7151138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:11,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102014649] [2022-03-15 15:52:11,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:11,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:11,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:11,846 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:11,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-15 15:52:11,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:11,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:12,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:12,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 15:52:12,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:12,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 15:52:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:12,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:12,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:12,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-15 15:52:12,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:12,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 52 [2022-03-15 15:52:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:12,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102014649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:12,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:12,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:52:12,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200256459] [2022-03-15 15:52:12,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:12,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:12,528 INFO L87 Difference]: Start difference. First operand 495 states and 1365 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:12,881 INFO L93 Difference]: Finished difference Result 597 states and 1559 transitions. [2022-03-15 15:52:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:52:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:12,882 INFO L225 Difference]: With dead ends: 597 [2022-03-15 15:52:12,882 INFO L226 Difference]: Without dead ends: 583 [2022-03-15 15:52:12,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:52:12,882 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:12,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 215 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 621 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-03-15 15:52:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-15 15:52:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 505. [2022-03-15 15:52:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.757936507936508) internal successors, (1390), 504 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1390 transitions. [2022-03-15 15:52:12,913 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1390 transitions. Word has length 18 [2022-03-15 15:52:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:12,913 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1390 transitions. [2022-03-15 15:52:12,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1390 transitions. [2022-03-15 15:52:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:12,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:12,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:12,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:13,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:13,114 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 331336144, now seen corresponding path program 309 times [2022-03-15 15:52:13,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:13,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541131069] [2022-03-15 15:52:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:13,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541131069] [2022-03-15 15:52:13,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541131069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:13,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592783119] [2022-03-15 15:52:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:13,248 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:13,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-15 15:52:13,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:13,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:13,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:13,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:13,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:13,734 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:13,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 15:52:13,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 15:52:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592783119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:13,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:13,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:52:13,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269250113] [2022-03-15 15:52:13,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:13,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:13,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:13,804 INFO L87 Difference]: Start difference. First operand 505 states and 1390 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:14,370 INFO L93 Difference]: Finished difference Result 720 states and 1789 transitions. [2022-03-15 15:52:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:52:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:14,371 INFO L225 Difference]: With dead ends: 720 [2022-03-15 15:52:14,371 INFO L226 Difference]: Without dead ends: 687 [2022-03-15 15:52:14,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:52:14,371 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:14,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 441 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-15 15:52:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 518. [2022-03-15 15:52:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.7775628626692455) internal successors, (1436), 517 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1436 transitions. [2022-03-15 15:52:14,377 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1436 transitions. Word has length 18 [2022-03-15 15:52:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1436 transitions. [2022-03-15 15:52:14,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1436 transitions. [2022-03-15 15:52:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:14,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:14,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:14,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-03-15 15:52:14,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:14,594 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1814834616, now seen corresponding path program 310 times [2022-03-15 15:52:14,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:14,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326562066] [2022-03-15 15:52:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:14,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:14,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326562066] [2022-03-15 15:52:14,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326562066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:14,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071894970] [2022-03-15 15:52:14,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:14,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:14,741 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:14,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-15 15:52:14,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:14,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:14,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:14,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:14,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:14,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:14,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:15,219 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:15,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:52:15,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:52:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:15,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071894970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:15,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:15,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:52:15,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558175638] [2022-03-15 15:52:15,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:15,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:15,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:15,296 INFO L87 Difference]: Start difference. First operand 518 states and 1436 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:16,199 INFO L93 Difference]: Finished difference Result 668 states and 1693 transitions. [2022-03-15 15:52:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:52:16,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:16,201 INFO L225 Difference]: With dead ends: 668 [2022-03-15 15:52:16,201 INFO L226 Difference]: Without dead ends: 635 [2022-03-15 15:52:16,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:52:16,201 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:16,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 342 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 868 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-03-15 15:52:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-03-15 15:52:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 524. [2022-03-15 15:52:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.783938814531549) internal successors, (1456), 523 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1456 transitions. [2022-03-15 15:52:16,207 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1456 transitions. Word has length 18 [2022-03-15 15:52:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:16,207 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1456 transitions. [2022-03-15 15:52:16,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1456 transitions. [2022-03-15 15:52:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:16,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:16,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:16,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-15 15:52:16,423 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash -849640292, now seen corresponding path program 311 times [2022-03-15 15:52:16,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:16,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097108932] [2022-03-15 15:52:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:16,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:16,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:16,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097108932] [2022-03-15 15:52:16,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097108932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:16,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402499603] [2022-03-15 15:52:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:16,533 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:16,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-15 15:52:16,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:16,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:16,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:16,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:52:16,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:16,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:52:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:16,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:17,059 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:17,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 91 [2022-03-15 15:52:17,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 66 [2022-03-15 15:52:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:17,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402499603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:17,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:17,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2022-03-15 15:52:17,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143263145] [2022-03-15 15:52:17,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:17,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:17,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:17,157 INFO L87 Difference]: Start difference. First operand 524 states and 1456 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:17,647 INFO L93 Difference]: Finished difference Result 631 states and 1632 transitions. [2022-03-15 15:52:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:52:17,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:17,648 INFO L225 Difference]: With dead ends: 631 [2022-03-15 15:52:17,648 INFO L226 Difference]: Without dead ends: 613 [2022-03-15 15:52:17,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:52:17,649 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:17,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 224 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 528 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-03-15 15:52:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-15 15:52:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 524. [2022-03-15 15:52:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.7820267686424476) internal successors, (1455), 523 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1455 transitions. [2022-03-15 15:52:17,655 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1455 transitions. Word has length 18 [2022-03-15 15:52:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:17,655 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1455 transitions. [2022-03-15 15:52:17,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1455 transitions. [2022-03-15 15:52:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:17,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:17,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:17,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-15 15:52:17,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-15 15:52:17,871 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash 373348560, now seen corresponding path program 312 times [2022-03-15 15:52:17,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:17,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578686102] [2022-03-15 15:52:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:18,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:18,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578686102] [2022-03-15 15:52:18,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578686102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:18,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950816177] [2022-03-15 15:52:18,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:18,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:18,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:18,028 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:18,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-15 15:52:18,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:18,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:18,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:18,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:18,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:18,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:18,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:18,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:18,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:52:18,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:18,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:52:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:18,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950816177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:18,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:18,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:52:18,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491223281] [2022-03-15 15:52:18,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:18,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:18,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:18,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:18,849 INFO L87 Difference]: Start difference. First operand 524 states and 1455 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:19,446 INFO L93 Difference]: Finished difference Result 571 states and 1542 transitions. [2022-03-15 15:52:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:52:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:19,447 INFO L225 Difference]: With dead ends: 571 [2022-03-15 15:52:19,447 INFO L226 Difference]: Without dead ends: 557 [2022-03-15 15:52:19,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:52:19,447 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:19,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 524 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-03-15 15:52:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-03-15 15:52:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 526. [2022-03-15 15:52:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.7847619047619045) internal successors, (1462), 525 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1462 transitions. [2022-03-15 15:52:19,453 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1462 transitions. Word has length 18 [2022-03-15 15:52:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:19,453 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1462 transitions. [2022-03-15 15:52:19,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1462 transitions. [2022-03-15 15:52:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:19,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:19,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:19,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-03-15 15:52:19,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:19,668 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:19,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1338542884, now seen corresponding path program 313 times [2022-03-15 15:52:19,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:19,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392421271] [2022-03-15 15:52:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:19,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:19,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392421271] [2022-03-15 15:52:19,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392421271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:19,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435459459] [2022-03-15 15:52:19,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:19,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:19,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:19,851 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:19,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-15 15:52:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:20,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:20,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:20,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:20,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:20,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:20,531 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:20,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:52:20,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:52:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:20,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435459459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:20,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:20,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-03-15 15:52:20,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21600257] [2022-03-15 15:52:20,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:20,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:20,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:20,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:20,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:20,615 INFO L87 Difference]: Start difference. First operand 526 states and 1462 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:21,210 INFO L93 Difference]: Finished difference Result 611 states and 1611 transitions. [2022-03-15 15:52:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:52:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:21,211 INFO L225 Difference]: With dead ends: 611 [2022-03-15 15:52:21,211 INFO L226 Difference]: Without dead ends: 593 [2022-03-15 15:52:21,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:52:21,212 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:21,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 264 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 603 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-03-15 15:52:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-15 15:52:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 522. [2022-03-15 15:52:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.775431861804223) internal successors, (1446), 521 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1446 transitions. [2022-03-15 15:52:21,218 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1446 transitions. Word has length 18 [2022-03-15 15:52:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:21,218 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1446 transitions. [2022-03-15 15:52:21,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1446 transitions. [2022-03-15 15:52:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:21,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:21,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:21,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:21,431 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 803313082, now seen corresponding path program 314 times [2022-03-15 15:52:21,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:21,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210812769] [2022-03-15 15:52:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:21,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:21,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210812769] [2022-03-15 15:52:21,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210812769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:21,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496520830] [2022-03-15 15:52:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:21,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:21,544 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:21,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-15 15:52:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:21,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:21,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:52:21,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:21,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:21,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:22,061 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:22,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:52:22,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:52:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:22,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496520830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:22,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:22,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-03-15 15:52:22,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957222056] [2022-03-15 15:52:22,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:22,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:22,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:22,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:22,129 INFO L87 Difference]: Start difference. First operand 522 states and 1446 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:22,480 INFO L93 Difference]: Finished difference Result 639 states and 1641 transitions. [2022-03-15 15:52:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:52:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:22,481 INFO L225 Difference]: With dead ends: 639 [2022-03-15 15:52:22,481 INFO L226 Difference]: Without dead ends: 619 [2022-03-15 15:52:22,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:52:22,481 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:22,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 406 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 658 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-15 15:52:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-15 15:52:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 524. [2022-03-15 15:52:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.7724665391969405) internal successors, (1450), 523 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1450 transitions. [2022-03-15 15:52:22,487 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1450 transitions. Word has length 18 [2022-03-15 15:52:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:22,487 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1450 transitions. [2022-03-15 15:52:22,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1450 transitions. [2022-03-15 15:52:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:22,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:22,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:22,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:22,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-03-15 15:52:22,697 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash -512449720, now seen corresponding path program 315 times [2022-03-15 15:52:22,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:22,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658881201] [2022-03-15 15:52:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:22,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:22,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658881201] [2022-03-15 15:52:22,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658881201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:22,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127857193] [2022-03-15 15:52:22,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:22,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:22,933 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:22,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-15 15:52:22,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:22,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:22,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:23,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:23,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:23,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:23,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:23,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:23,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:23,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:52:23,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:23,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:52:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:23,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127857193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:23,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:23,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:52:23,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140843442] [2022-03-15 15:52:23,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:23,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:52:23,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:52:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:52:23,881 INFO L87 Difference]: Start difference. First operand 524 states and 1450 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:24,341 INFO L93 Difference]: Finished difference Result 579 states and 1562 transitions. [2022-03-15 15:52:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:52:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:24,342 INFO L225 Difference]: With dead ends: 579 [2022-03-15 15:52:24,342 INFO L226 Difference]: Without dead ends: 565 [2022-03-15 15:52:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:52:24,342 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:24,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 175 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 527 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-03-15 15:52:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-15 15:52:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 529. [2022-03-15 15:52:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.774621212121212) internal successors, (1465), 528 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1465 transitions. [2022-03-15 15:52:24,348 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1465 transitions. Word has length 18 [2022-03-15 15:52:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:24,348 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1465 transitions. [2022-03-15 15:52:24,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1465 transitions. [2022-03-15 15:52:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:24,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:24,348 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:24,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-03-15 15:52:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-15 15:52:24,549 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 452744604, now seen corresponding path program 316 times [2022-03-15 15:52:24,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:24,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563356272] [2022-03-15 15:52:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:24,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:24,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563356272] [2022-03-15 15:52:24,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563356272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:24,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524841336] [2022-03-15 15:52:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:24,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:24,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:24,756 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:24,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-15 15:52:24,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:25,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:25,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:25,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:25,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:25,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:25,513 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:25,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:52:25,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:52:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:25,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524841336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:25,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:25,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:52:25,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816483710] [2022-03-15 15:52:25,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:25,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:52:25,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:52:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:52:25,596 INFO L87 Difference]: Start difference. First operand 529 states and 1465 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:26,110 INFO L93 Difference]: Finished difference Result 668 states and 1716 transitions. [2022-03-15 15:52:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:52:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:26,111 INFO L225 Difference]: With dead ends: 668 [2022-03-15 15:52:26,111 INFO L226 Difference]: Without dead ends: 650 [2022-03-15 15:52:26,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:52:26,111 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:26,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 365 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 622 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-03-15 15:52:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-15 15:52:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 534. [2022-03-15 15:52:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.776735459662289) internal successors, (1480), 533 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1480 transitions. [2022-03-15 15:52:26,117 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1480 transitions. Word has length 18 [2022-03-15 15:52:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:26,117 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1480 transitions. [2022-03-15 15:52:26,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1480 transitions. [2022-03-15 15:52:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:26,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:26,118 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:26,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:26,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-15 15:52:26,327 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1298503740, now seen corresponding path program 317 times [2022-03-15 15:52:26,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:26,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348223834] [2022-03-15 15:52:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:26,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:26,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348223834] [2022-03-15 15:52:26,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348223834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:26,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460885296] [2022-03-15 15:52:26,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:26,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:26,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:26,417 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:26,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-15 15:52:26,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:26,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:52:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:26,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:26,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:52:26,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:26,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:52:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:26,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:26,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:52:26,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:26,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:52:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460885296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:26,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:26,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:52:26,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013164036] [2022-03-15 15:52:26,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:26,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:52:26,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:52:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:26,704 INFO L87 Difference]: Start difference. First operand 534 states and 1480 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:26,795 INFO L93 Difference]: Finished difference Result 564 states and 1547 transitions. [2022-03-15 15:52:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:52:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:26,796 INFO L225 Difference]: With dead ends: 564 [2022-03-15 15:52:26,796 INFO L226 Difference]: Without dead ends: 564 [2022-03-15 15:52:26,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:26,797 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:26,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-03-15 15:52:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-15 15:52:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 537. [2022-03-15 15:52:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.7779850746268657) internal successors, (1489), 536 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1489 transitions. [2022-03-15 15:52:26,802 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1489 transitions. Word has length 18 [2022-03-15 15:52:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:26,802 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1489 transitions. [2022-03-15 15:52:26,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1489 transitions. [2022-03-15 15:52:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:26,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:26,803 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:26,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:27,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:27,011 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash -333309416, now seen corresponding path program 318 times [2022-03-15 15:52:27,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:27,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742787268] [2022-03-15 15:52:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:27,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:27,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:27,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742787268] [2022-03-15 15:52:27,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742787268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:27,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6978376] [2022-03-15 15:52:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:27,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:27,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:27,087 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:27,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-15 15:52:27,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:52:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:27,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:27,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:27,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:27,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:27,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:52:27,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:27,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:52:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:27,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6978376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:27,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:27,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:52:27,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292491719] [2022-03-15 15:52:27,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:27,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:52:27,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:52:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:27,437 INFO L87 Difference]: Start difference. First operand 537 states and 1489 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:27,513 INFO L93 Difference]: Finished difference Result 579 states and 1568 transitions. [2022-03-15 15:52:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:52:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:27,514 INFO L225 Difference]: With dead ends: 579 [2022-03-15 15:52:27,514 INFO L226 Difference]: Without dead ends: 579 [2022-03-15 15:52:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:27,514 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:27,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 205 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-03-15 15:52:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-03-15 15:52:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 534. [2022-03-15 15:52:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.776735459662289) internal successors, (1480), 533 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1480 transitions. [2022-03-15 15:52:27,520 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1480 transitions. Word has length 18 [2022-03-15 15:52:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:27,520 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1480 transitions. [2022-03-15 15:52:27,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1480 transitions. [2022-03-15 15:52:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:27,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:27,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:27,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:27,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-15 15:52:27,736 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash -82485198, now seen corresponding path program 319 times [2022-03-15 15:52:27,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:27,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223423413] [2022-03-15 15:52:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:27,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:27,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223423413] [2022-03-15 15:52:27,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223423413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:27,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100723938] [2022-03-15 15:52:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:27,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:27,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:27,921 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:27,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-15 15:52:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:27,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:28,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:28,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:28,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:28,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:28,687 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:28,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:52:28,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:52:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:28,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100723938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:28,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:28,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:52:28,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075659902] [2022-03-15 15:52:28,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:28,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:52:28,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:52:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:52:28,772 INFO L87 Difference]: Start difference. First operand 534 states and 1480 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:29,211 INFO L93 Difference]: Finished difference Result 655 states and 1689 transitions. [2022-03-15 15:52:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:52:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:29,212 INFO L225 Difference]: With dead ends: 655 [2022-03-15 15:52:29,212 INFO L226 Difference]: Without dead ends: 635 [2022-03-15 15:52:29,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:52:29,212 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:29,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 335 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 612 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-03-15 15:52:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-03-15 15:52:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 536. [2022-03-15 15:52:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.777570093457944) internal successors, (1486), 535 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1486 transitions. [2022-03-15 15:52:29,218 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1486 transitions. Word has length 18 [2022-03-15 15:52:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:29,218 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 1486 transitions. [2022-03-15 15:52:29,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1486 transitions. [2022-03-15 15:52:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:29,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:29,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:29,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:29,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-15 15:52:29,435 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash 505260124, now seen corresponding path program 320 times [2022-03-15 15:52:29,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:29,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001146906] [2022-03-15 15:52:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:29,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:29,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:29,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001146906] [2022-03-15 15:52:29,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001146906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:29,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524258921] [2022-03-15 15:52:29,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:29,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:29,574 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:29,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-15 15:52:29,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:29,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:29,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:29,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:29,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:30,306 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:30,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:52:30,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:52:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:30,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524258921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:30,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:30,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:52:30,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691845037] [2022-03-15 15:52:30,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:30,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:30,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:30,373 INFO L87 Difference]: Start difference. First operand 536 states and 1486 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:30,888 INFO L93 Difference]: Finished difference Result 693 states and 1754 transitions. [2022-03-15 15:52:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:52:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:30,889 INFO L225 Difference]: With dead ends: 693 [2022-03-15 15:52:30,889 INFO L226 Difference]: Without dead ends: 671 [2022-03-15 15:52:30,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:52:30,890 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:30,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 451 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 803 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2022-03-15 15:52:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-03-15 15:52:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 542. [2022-03-15 15:52:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.765249537892791) internal successors, (1496), 541 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1496 transitions. [2022-03-15 15:52:30,903 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1496 transitions. Word has length 18 [2022-03-15 15:52:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:30,903 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1496 transitions. [2022-03-15 15:52:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1496 transitions. [2022-03-15 15:52:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:30,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:30,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:30,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-03-15 15:52:31,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-03-15 15:52:31,115 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash -368135950, now seen corresponding path program 321 times [2022-03-15 15:52:31,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:31,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14965694] [2022-03-15 15:52:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:31,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:31,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14965694] [2022-03-15 15:52:31,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14965694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:31,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781943759] [2022-03-15 15:52:31,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:31,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:31,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:31,297 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:31,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-15 15:52:31,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:31,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:31,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:31,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:31,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:31,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:31,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:31,948 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:31,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:52:31,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:52:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:32,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781943759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:32,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:32,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:52:32,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086671976] [2022-03-15 15:52:32,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:32,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:32,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:32,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:32,038 INFO L87 Difference]: Start difference. First operand 542 states and 1496 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:33,072 INFO L93 Difference]: Finished difference Result 774 states and 1948 transitions. [2022-03-15 15:52:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:52:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:33,074 INFO L225 Difference]: With dead ends: 774 [2022-03-15 15:52:33,074 INFO L226 Difference]: Without dead ends: 751 [2022-03-15 15:52:33,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:52:33,074 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:33,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 462 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:52:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-15 15:52:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 552. [2022-03-15 15:52:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.7731397459165152) internal successors, (1528), 551 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1528 transitions. [2022-03-15 15:52:33,088 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1528 transitions. Word has length 18 [2022-03-15 15:52:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:33,088 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1528 transitions. [2022-03-15 15:52:33,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1528 transitions. [2022-03-15 15:52:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:33,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:33,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:33,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-03-15 15:52:33,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-03-15 15:52:33,299 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash -33054658, now seen corresponding path program 322 times [2022-03-15 15:52:33,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:33,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831041874] [2022-03-15 15:52:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:33,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831041874] [2022-03-15 15:52:33,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831041874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947112182] [2022-03-15 15:52:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:33,479 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:33,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-15 15:52:33,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:33,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:33,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:33,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:33,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-15 15:52:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:34,166 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:34,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:52:34,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:52:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:34,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947112182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:34,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:34,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:52:34,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396459542] [2022-03-15 15:52:34,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:34,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:34,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:34,224 INFO L87 Difference]: Start difference. First operand 552 states and 1528 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:35,273 INFO L93 Difference]: Finished difference Result 795 states and 1982 transitions. [2022-03-15 15:52:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:52:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:35,274 INFO L225 Difference]: With dead ends: 795 [2022-03-15 15:52:35,274 INFO L226 Difference]: Without dead ends: 768 [2022-03-15 15:52:35,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:52:35,274 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 90 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:35,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 495 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:52:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-15 15:52:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 554. [2022-03-15 15:52:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.7721518987341773) internal successors, (1533), 553 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1533 transitions. [2022-03-15 15:52:35,281 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1533 transitions. Word has length 18 [2022-03-15 15:52:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:35,281 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1533 transitions. [2022-03-15 15:52:35,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1533 transitions. [2022-03-15 15:52:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:35,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:35,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:35,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:35,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:35,498 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2100455566, now seen corresponding path program 323 times [2022-03-15 15:52:35,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:35,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415408958] [2022-03-15 15:52:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:35,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:35,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415408958] [2022-03-15 15:52:35,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415408958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:35,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656915968] [2022-03-15 15:52:35,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:35,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:35,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:35,678 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:35,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-15 15:52:35,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:35,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:35,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:35,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:35,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:36,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:36,486 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:36,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 15:52:36,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 15:52:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:36,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656915968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:36,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:36,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:52:36,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188022432] [2022-03-15 15:52:36,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:36,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:52:36,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:52:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:52:36,547 INFO L87 Difference]: Start difference. First operand 554 states and 1533 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:37,937 INFO L93 Difference]: Finished difference Result 880 states and 2114 transitions. [2022-03-15 15:52:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:52:37,937 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:37,938 INFO L225 Difference]: With dead ends: 880 [2022-03-15 15:52:37,938 INFO L226 Difference]: Without dead ends: 840 [2022-03-15 15:52:37,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:52:37,938 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:37,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 383 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:52:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-15 15:52:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 552. [2022-03-15 15:52:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.7695099818511797) internal successors, (1526), 551 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1526 transitions. [2022-03-15 15:52:37,946 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1526 transitions. Word has length 18 [2022-03-15 15:52:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:37,947 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1526 transitions. [2022-03-15 15:52:37,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1526 transitions. [2022-03-15 15:52:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:37,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:37,948 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:37,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:38,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:38,167 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1624376740, now seen corresponding path program 324 times [2022-03-15 15:52:38,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:38,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980781251] [2022-03-15 15:52:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:38,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:38,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980781251] [2022-03-15 15:52:38,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980781251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:38,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508831354] [2022-03-15 15:52:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:38,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:38,311 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:38,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-15 15:52:38,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:38,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:38,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:38,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:38,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:38,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:38,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:38,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:38,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-15 15:52:38,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:38,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2022-03-15 15:52:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:38,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508831354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:38,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:38,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:52:38,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840524070] [2022-03-15 15:52:38,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:38,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:38,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:38,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:38,818 INFO L87 Difference]: Start difference. First operand 552 states and 1526 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:39,713 INFO L93 Difference]: Finished difference Result 705 states and 1793 transitions. [2022-03-15 15:52:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:52:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:39,714 INFO L225 Difference]: With dead ends: 705 [2022-03-15 15:52:39,714 INFO L226 Difference]: Without dead ends: 665 [2022-03-15 15:52:39,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:52:39,715 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:39,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 278 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-15 15:52:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 558. [2022-03-15 15:52:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 2.7755834829443446) internal successors, (1546), 557 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1546 transitions. [2022-03-15 15:52:39,721 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1546 transitions. Word has length 18 [2022-03-15 15:52:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:39,721 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1546 transitions. [2022-03-15 15:52:39,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1546 transitions. [2022-03-15 15:52:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:39,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:39,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:39,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:39,937 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2058443150, now seen corresponding path program 325 times [2022-03-15 15:52:39,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:39,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820055273] [2022-03-15 15:52:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:40,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:40,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820055273] [2022-03-15 15:52:40,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820055273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:40,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740619854] [2022-03-15 15:52:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:40,123 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:40,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-15 15:52:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:40,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:40,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:40,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:40,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:40,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:40,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:40,832 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:40,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:52:40,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:52:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:40,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740619854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:40,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:40,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:40,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472638860] [2022-03-15 15:52:40,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:40,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:40,941 INFO L87 Difference]: Start difference. First operand 558 states and 1546 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:42,236 INFO L93 Difference]: Finished difference Result 729 states and 1842 transitions. [2022-03-15 15:52:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:52:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:42,237 INFO L225 Difference]: With dead ends: 729 [2022-03-15 15:52:42,237 INFO L226 Difference]: Without dead ends: 689 [2022-03-15 15:52:42,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=1816, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:52:42,237 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:42,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 368 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1053 Invalid, 0 Unknown, 14 Unchecked, 0.4s Time] [2022-03-15 15:52:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-03-15 15:52:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 561. [2022-03-15 15:52:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.7767857142857144) internal successors, (1555), 560 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1555 transitions. [2022-03-15 15:52:42,244 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1555 transitions. Word has length 18 [2022-03-15 15:52:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:42,244 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1555 transitions. [2022-03-15 15:52:42,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1555 transitions. [2022-03-15 15:52:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:42,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:42,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:42,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-03-15 15:52:42,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:42,456 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1093248826, now seen corresponding path program 326 times [2022-03-15 15:52:42,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:42,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139339659] [2022-03-15 15:52:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:42,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139339659] [2022-03-15 15:52:42,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139339659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:42,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308666155] [2022-03-15 15:52:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:42,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:42,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:42,649 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:42,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-15 15:52:42,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:42,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:42,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:42,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:42,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:43,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:43,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 118 [2022-03-15 15:52:43,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:43,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 90 [2022-03-15 15:52:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:43,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308666155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:43,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:43,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:52:43,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711035113] [2022-03-15 15:52:43,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:43,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:43,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:43,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:43,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:43,237 INFO L87 Difference]: Start difference. First operand 561 states and 1555 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:43,674 INFO L93 Difference]: Finished difference Result 644 states and 1702 transitions. [2022-03-15 15:52:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:52:43,675 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:43,676 INFO L225 Difference]: With dead ends: 644 [2022-03-15 15:52:43,676 INFO L226 Difference]: Without dead ends: 630 [2022-03-15 15:52:43,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:52:43,676 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:43,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 185 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 582 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-03-15 15:52:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-15 15:52:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 561. [2022-03-15 15:52:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.7767857142857144) internal successors, (1555), 560 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1555 transitions. [2022-03-15 15:52:43,682 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1555 transitions. Word has length 18 [2022-03-15 15:52:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:43,683 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1555 transitions. [2022-03-15 15:52:43,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1555 transitions. [2022-03-15 15:52:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:43,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:43,683 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:43,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-15 15:52:43,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:43,887 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 483276218, now seen corresponding path program 327 times [2022-03-15 15:52:43,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:43,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011911940] [2022-03-15 15:52:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:43,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:43,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011911940] [2022-03-15 15:52:43,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011911940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:43,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339986005] [2022-03-15 15:52:43,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:43,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:43,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:43,967 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:43,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-15 15:52:43,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 15:52:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:44,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:52:44,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:44,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:52:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:44,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:44,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:44,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:52:44,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:44,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:52:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:44,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339986005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:44,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:44,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:52:44,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367900766] [2022-03-15 15:52:44,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:52:44,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:52:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:44,178 INFO L87 Difference]: Start difference. First operand 561 states and 1555 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:44,461 INFO L93 Difference]: Finished difference Result 672 states and 1745 transitions. [2022-03-15 15:52:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:52:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:44,462 INFO L225 Difference]: With dead ends: 672 [2022-03-15 15:52:44,462 INFO L226 Difference]: Without dead ends: 672 [2022-03-15 15:52:44,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:52:44,463 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:44,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 132 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 355 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-03-15 15:52:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-03-15 15:52:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 562. [2022-03-15 15:52:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.770053475935829) internal successors, (1554), 561 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1554 transitions. [2022-03-15 15:52:44,469 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1554 transitions. Word has length 18 [2022-03-15 15:52:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:44,469 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1554 transitions. [2022-03-15 15:52:44,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1554 transitions. [2022-03-15 15:52:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:44,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:44,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:44,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-03-15 15:52:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-15 15:52:44,684 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash -756058254, now seen corresponding path program 328 times [2022-03-15 15:52:44,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:44,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397076681] [2022-03-15 15:52:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:44,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:44,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:44,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397076681] [2022-03-15 15:52:44,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397076681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:44,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367259211] [2022-03-15 15:52:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:44,832 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:44,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-15 15:52:44,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:44,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:44,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:44,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:44,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:45,356 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:45,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:52:45,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:52:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367259211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:45,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:45,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:45,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895881050] [2022-03-15 15:52:45,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:45,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:45,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:45,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:45,418 INFO L87 Difference]: Start difference. First operand 562 states and 1554 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:46,232 INFO L93 Difference]: Finished difference Result 776 states and 1947 transitions. [2022-03-15 15:52:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:52:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:46,233 INFO L225 Difference]: With dead ends: 776 [2022-03-15 15:52:46,233 INFO L226 Difference]: Without dead ends: 736 [2022-03-15 15:52:46,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:52:46,234 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:46,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 259 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 744 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-03-15 15:52:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-15 15:52:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 566. [2022-03-15 15:52:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.775221238938053) internal successors, (1568), 565 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1568 transitions. [2022-03-15 15:52:46,240 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1568 transitions. Word has length 18 [2022-03-15 15:52:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:46,240 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1568 transitions. [2022-03-15 15:52:46,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1568 transitions. [2022-03-15 15:52:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:46,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:46,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:46,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-03-15 15:52:46,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-15 15:52:46,457 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash 209136070, now seen corresponding path program 329 times [2022-03-15 15:52:46,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:46,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004855740] [2022-03-15 15:52:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:46,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:46,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:46,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004855740] [2022-03-15 15:52:46,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004855740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:46,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750574291] [2022-03-15 15:52:46,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:46,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:46,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:46,638 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:46,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-15 15:52:46,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:46,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:46,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:46,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:46,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:47,335 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:47,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:52:47,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:52:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:47,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750574291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:47,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:47,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:47,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419090123] [2022-03-15 15:52:47,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:47,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:47,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:47,396 INFO L87 Difference]: Start difference. First operand 566 states and 1568 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:47,823 INFO L93 Difference]: Finished difference Result 690 states and 1788 transitions. [2022-03-15 15:52:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:52:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:47,824 INFO L225 Difference]: With dead ends: 690 [2022-03-15 15:52:47,824 INFO L226 Difference]: Without dead ends: 665 [2022-03-15 15:52:47,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:52:47,824 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:47,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 234 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 613 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-03-15 15:52:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-15 15:52:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 569. [2022-03-15 15:52:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2022-03-15 15:52:47,830 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2022-03-15 15:52:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:47,831 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2022-03-15 15:52:47,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2022-03-15 15:52:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:47,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:47,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:47,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-03-15 15:52:48,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-15 15:52:48,047 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash -326093732, now seen corresponding path program 330 times [2022-03-15 15:52:48,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:48,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851244799] [2022-03-15 15:52:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:48,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:48,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851244799] [2022-03-15 15:52:48,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851244799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:48,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280743871] [2022-03-15 15:52:48,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:48,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:48,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:48,147 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:48,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-15 15:52:48,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:48,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:48,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:48,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:48,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:48,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:48,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:48,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:48,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:52:48,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:48,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:52:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:48,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280743871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:48,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:48,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:52:48,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287524039] [2022-03-15 15:52:48,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:48,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:52:48,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:52:48,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:52:48,706 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:48,943 INFO L93 Difference]: Finished difference Result 631 states and 1690 transitions. [2022-03-15 15:52:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:52:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:48,944 INFO L225 Difference]: With dead ends: 631 [2022-03-15 15:52:48,944 INFO L226 Difference]: Without dead ends: 617 [2022-03-15 15:52:48,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:48,944 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:48,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 489 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2022-03-15 15:52:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-03-15 15:52:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 568. [2022-03-15 15:52:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.7760141093474426) internal successors, (1574), 567 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1574 transitions. [2022-03-15 15:52:48,950 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1574 transitions. Word has length 18 [2022-03-15 15:52:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:48,950 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1574 transitions. [2022-03-15 15:52:48,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1574 transitions. [2022-03-15 15:52:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:48,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:48,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:48,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-03-15 15:52:49,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:49,166 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -420612666, now seen corresponding path program 331 times [2022-03-15 15:52:49,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:49,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236808064] [2022-03-15 15:52:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:49,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:49,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236808064] [2022-03-15 15:52:49,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236808064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:49,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282335875] [2022-03-15 15:52:49,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:49,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:49,334 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:49,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-15 15:52:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:49,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:49,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:49,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:49,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:49,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:49,744 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:49,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:52:49,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:52:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:49,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282335875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:49,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:49,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:49,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668555974] [2022-03-15 15:52:49,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:49,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:49,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:49,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:49,828 INFO L87 Difference]: Start difference. First operand 568 states and 1574 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:50,542 INFO L93 Difference]: Finished difference Result 751 states and 1938 transitions. [2022-03-15 15:52:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:52:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:50,543 INFO L225 Difference]: With dead ends: 751 [2022-03-15 15:52:50,543 INFO L226 Difference]: Without dead ends: 725 [2022-03-15 15:52:50,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:52:50,543 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:50,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 371 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:52:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-15 15:52:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 582. [2022-03-15 15:52:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.7814113597246126) internal successors, (1616), 581 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1616 transitions. [2022-03-15 15:52:50,550 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1616 transitions. Word has length 18 [2022-03-15 15:52:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:50,550 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1616 transitions. [2022-03-15 15:52:50,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1616 transitions. [2022-03-15 15:52:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:50,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:50,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:50,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:50,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:50,766 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1806953722, now seen corresponding path program 332 times [2022-03-15 15:52:50,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:50,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071547194] [2022-03-15 15:52:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:50,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:50,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:50,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071547194] [2022-03-15 15:52:50,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071547194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:50,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594684321] [2022-03-15 15:52:50,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:50,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:50,983 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:50,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-15 15:52:51,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:51,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:51,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:51,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:51,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:51,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:51,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:51,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:51,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:51,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:51,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 79 [2022-03-15 15:52:51,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:51,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 59 [2022-03-15 15:52:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:51,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594684321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:51,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:51,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:52:51,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024245186] [2022-03-15 15:52:51,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:51,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:51,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:51,829 INFO L87 Difference]: Start difference. First operand 582 states and 1616 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:52,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:52,918 INFO L93 Difference]: Finished difference Result 750 states and 1932 transitions. [2022-03-15 15:52:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:52:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:52,919 INFO L225 Difference]: With dead ends: 750 [2022-03-15 15:52:52,919 INFO L226 Difference]: Without dead ends: 719 [2022-03-15 15:52:52,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:52:52,919 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:52,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 342 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:52:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-03-15 15:52:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 583. [2022-03-15 15:52:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.783505154639175) internal successors, (1620), 582 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1620 transitions. [2022-03-15 15:52:52,926 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1620 transitions. Word has length 18 [2022-03-15 15:52:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:52,926 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1620 transitions. [2022-03-15 15:52:52,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1620 transitions. [2022-03-15 15:52:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:52,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:52,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:52,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-15 15:52:53,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:53,135 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash -339217038, now seen corresponding path program 333 times [2022-03-15 15:52:53,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:53,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328785036] [2022-03-15 15:52:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:53,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:53,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328785036] [2022-03-15 15:52:53,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328785036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:53,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146389969] [2022-03-15 15:52:53,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:53,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:53,351 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:53,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-15 15:52:53,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:53,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:53,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:53,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:53,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:53,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:53,960 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:53,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:52:53,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:52:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:54,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146389969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:54,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:54,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:54,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546882973] [2022-03-15 15:52:54,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:54,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:54,043 INFO L87 Difference]: Start difference. First operand 583 states and 1620 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:55,269 INFO L93 Difference]: Finished difference Result 824 states and 2037 transitions. [2022-03-15 15:52:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:52:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:55,270 INFO L225 Difference]: With dead ends: 824 [2022-03-15 15:52:55,270 INFO L226 Difference]: Without dead ends: 781 [2022-03-15 15:52:55,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:52:55,270 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:55,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 390 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1032 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-03-15 15:52:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-15 15:52:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 586. [2022-03-15 15:52:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.781196581196581) internal successors, (1627), 585 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1627 transitions. [2022-03-15 15:52:55,277 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1627 transitions. Word has length 18 [2022-03-15 15:52:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:55,277 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1627 transitions. [2022-03-15 15:52:55,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1627 transitions. [2022-03-15 15:52:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:55,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:55,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:55,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-03-15 15:52:55,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-03-15 15:52:55,491 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 625977286, now seen corresponding path program 334 times [2022-03-15 15:52:55,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:55,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194559866] [2022-03-15 15:52:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:55,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:55,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:55,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194559866] [2022-03-15 15:52:55,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194559866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:55,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891888183] [2022-03-15 15:52:55,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:55,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:55,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:55,594 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:55,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-15 15:52:55,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:55,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:55,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:55,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:55,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:52:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:55,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:56,010 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:56,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 91 [2022-03-15 15:52:56,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 66 [2022-03-15 15:52:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:56,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891888183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:56,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:56,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:56,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511081110] [2022-03-15 15:52:56,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:56,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:56,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:56,075 INFO L87 Difference]: Start difference. First operand 586 states and 1627 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:56,560 INFO L93 Difference]: Finished difference Result 721 states and 1861 transitions. [2022-03-15 15:52:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:52:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:56,561 INFO L225 Difference]: With dead ends: 721 [2022-03-15 15:52:56,561 INFO L226 Difference]: Without dead ends: 703 [2022-03-15 15:52:56,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:52:56,562 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:56,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 308 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 730 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-03-15 15:52:56,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-03-15 15:52:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 585. [2022-03-15 15:52:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.7773972602739727) internal successors, (1622), 584 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1622 transitions. [2022-03-15 15:52:56,568 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1622 transitions. Word has length 18 [2022-03-15 15:52:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:56,568 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1622 transitions. [2022-03-15 15:52:56,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1622 transitions. [2022-03-15 15:52:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:56,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:56,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:56,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-03-15 15:52:56,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2022-03-15 15:52:56,778 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1848966138, now seen corresponding path program 335 times [2022-03-15 15:52:56,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:56,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066686322] [2022-03-15 15:52:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:56,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:56,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066686322] [2022-03-15 15:52:56,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066686322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:56,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028087437] [2022-03-15 15:52:56,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:56,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:56,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:56,920 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:56,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-15 15:52:56,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:56,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:56,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:52:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:57,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:57,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:52:57,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:57,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:52:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:57,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:57,456 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:52:57,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:52:57,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:52:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:52:57,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028087437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:57,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:57,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:52:57,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656758262] [2022-03-15 15:52:57,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:57,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:57,517 INFO L87 Difference]: Start difference. First operand 585 states and 1622 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:58,529 INFO L93 Difference]: Finished difference Result 739 states and 1882 transitions. [2022-03-15 15:52:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:52:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:58,530 INFO L225 Difference]: With dead ends: 739 [2022-03-15 15:52:58,530 INFO L226 Difference]: Without dead ends: 699 [2022-03-15 15:52:58,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:52:58,530 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 158 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:58,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 300 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 857 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-03-15 15:52:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-15 15:52:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 587. [2022-03-15 15:52:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.779863481228669) internal successors, (1629), 586 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1629 transitions. [2022-03-15 15:52:58,537 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1629 transitions. Word has length 18 [2022-03-15 15:52:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:58,537 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 1629 transitions. [2022-03-15 15:52:58,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1629 transitions. [2022-03-15 15:52:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:58,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:58,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:58,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:58,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:58,754 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:58,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1480806834, now seen corresponding path program 336 times [2022-03-15 15:52:58,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:58,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66269372] [2022-03-15 15:52:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:58,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:58,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66269372] [2022-03-15 15:52:58,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66269372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:58,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004639701] [2022-03-15 15:52:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:58,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:58,934 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:52:58,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-15 15:52:58,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:58,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:52:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:59,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:52:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:59,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:52:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:59,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:59,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:59,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:52:59,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:59,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:52:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:59,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004639701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:59,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:59,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:52:59,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112210983] [2022-03-15 15:52:59,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:59,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:52:59,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:52:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:52:59,523 INFO L87 Difference]: Start difference. First operand 587 states and 1629 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:59,737 INFO L93 Difference]: Finished difference Result 640 states and 1725 transitions. [2022-03-15 15:52:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:52:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:59,738 INFO L225 Difference]: With dead ends: 640 [2022-03-15 15:52:59,738 INFO L226 Difference]: Without dead ends: 626 [2022-03-15 15:52:59,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:52:59,739 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:59,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 177 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 410 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2022-03-15 15:52:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-03-15 15:52:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 588. [2022-03-15 15:52:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.7819420783645654) internal successors, (1633), 587 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1633 transitions. [2022-03-15 15:52:59,744 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1633 transitions. Word has length 18 [2022-03-15 15:52:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:59,745 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1633 transitions. [2022-03-15 15:52:59,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1633 transitions. [2022-03-15 15:52:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:59,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:59,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:59,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-03-15 15:52:59,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:59,955 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2016036636, now seen corresponding path program 337 times [2022-03-15 15:52:59,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:59,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431650723] [2022-03-15 15:52:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:59,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:00,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:00,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431650723] [2022-03-15 15:53:00,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431650723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:00,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696160159] [2022-03-15 15:53:00,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:00,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:00,140 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:00,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-15 15:53:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:00,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:00,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:00,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:00,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:00,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:00,840 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:00,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:53:00,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:53:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:53:00,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696160159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:00,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:00,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-03-15 15:53:00,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797920041] [2022-03-15 15:53:00,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:00,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:53:00,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:53:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:00,927 INFO L87 Difference]: Start difference. First operand 588 states and 1633 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:01,178 INFO L93 Difference]: Finished difference Result 676 states and 1783 transitions. [2022-03-15 15:53:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:53:01,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:01,179 INFO L225 Difference]: With dead ends: 676 [2022-03-15 15:53:01,179 INFO L226 Difference]: Without dead ends: 656 [2022-03-15 15:53:01,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:01,179 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:01,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 249 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 430 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-03-15 15:53:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-15 15:53:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 588. [2022-03-15 15:53:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.7802385008517887) internal successors, (1632), 587 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1632 transitions. [2022-03-15 15:53:01,186 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1632 transitions. Word has length 18 [2022-03-15 15:53:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:01,186 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1632 transitions. [2022-03-15 15:53:01,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1632 transitions. [2022-03-15 15:53:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:01,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:01,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:01,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-03-15 15:53:01,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-15 15:53:01,392 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 963167858, now seen corresponding path program 338 times [2022-03-15 15:53:01,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:01,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168285296] [2022-03-15 15:53:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:01,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:01,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:01,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168285296] [2022-03-15 15:53:01,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168285296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:01,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849174031] [2022-03-15 15:53:01,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:01,621 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:01,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-15 15:53:01,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:01,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:01,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:01,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:01,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:01,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:01,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:02,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:02,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:53:02,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:02,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:53:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:02,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849174031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:02,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:02,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:53:02,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577768718] [2022-03-15 15:53:02,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:02,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:53:02,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:53:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:02,337 INFO L87 Difference]: Start difference. First operand 588 states and 1632 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:02,767 INFO L93 Difference]: Finished difference Result 683 states and 1805 transitions. [2022-03-15 15:53:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:53:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:02,768 INFO L225 Difference]: With dead ends: 683 [2022-03-15 15:53:02,768 INFO L226 Difference]: Without dead ends: 669 [2022-03-15 15:53:02,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:53:02,769 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:02,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 156 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 534 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-15 15:53:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-03-15 15:53:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 591. [2022-03-15 15:53:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.7813559322033896) internal successors, (1641), 590 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1641 transitions. [2022-03-15 15:53:02,775 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1641 transitions. Word has length 18 [2022-03-15 15:53:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:02,775 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1641 transitions. [2022-03-15 15:53:02,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1641 transitions. [2022-03-15 15:53:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:02,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:02,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:02,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:02,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-15 15:53:02,977 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1928362182, now seen corresponding path program 339 times [2022-03-15 15:53:02,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:02,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777034640] [2022-03-15 15:53:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:02,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:03,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:03,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777034640] [2022-03-15 15:53:03,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777034640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:03,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774594600] [2022-03-15 15:53:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:03,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:03,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:03,197 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:03,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-15 15:53:03,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:03,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:03,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:03,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:53:03,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:03,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:03,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:03,779 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:03,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 115 [2022-03-15 15:53:03,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 78 [2022-03-15 15:53:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:03,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774594600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:03,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:03,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:53:03,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082136510] [2022-03-15 15:53:03,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:03,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:53:03,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:53:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:03,830 INFO L87 Difference]: Start difference. First operand 591 states and 1641 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:04,035 INFO L93 Difference]: Finished difference Result 693 states and 1830 transitions. [2022-03-15 15:53:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:53:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:04,037 INFO L225 Difference]: With dead ends: 693 [2022-03-15 15:53:04,037 INFO L226 Difference]: Without dead ends: 675 [2022-03-15 15:53:04,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:53:04,037 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:04,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 316 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 601 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-15 15:53:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-15 15:53:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 594. [2022-03-15 15:53:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.784148397976391) internal successors, (1651), 593 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1651 transitions. [2022-03-15 15:53:04,043 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1651 transitions. Word has length 18 [2022-03-15 15:53:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:04,043 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1651 transitions. [2022-03-15 15:53:04,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1651 transitions. [2022-03-15 15:53:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:04,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:04,044 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:04,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:04,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-03-15 15:53:04,260 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash 177113838, now seen corresponding path program 340 times [2022-03-15 15:53:04,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:04,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718278323] [2022-03-15 15:53:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:04,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:04,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:04,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718278323] [2022-03-15 15:53:04,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718278323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:04,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852471172] [2022-03-15 15:53:04,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:04,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:04,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:04,314 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:04,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-15 15:53:04,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:53:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:04,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:04,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:04,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:53:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:04,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:04,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:04,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:53:04,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:04,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:04,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852471172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:04,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:04,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:53:04,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412764055] [2022-03-15 15:53:04,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:53:04,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:53:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:53:04,531 INFO L87 Difference]: Start difference. First operand 594 states and 1651 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:04,600 INFO L93 Difference]: Finished difference Result 628 states and 1717 transitions. [2022-03-15 15:53:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:53:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:04,601 INFO L225 Difference]: With dead ends: 628 [2022-03-15 15:53:04,601 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 15:53:04,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:53:04,602 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:04,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-03-15 15:53:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 15:53:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 592. [2022-03-15 15:53:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.7834179357021998) internal successors, (1645), 591 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1645 transitions. [2022-03-15 15:53:04,608 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1645 transitions. Word has length 18 [2022-03-15 15:53:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:04,608 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1645 transitions. [2022-03-15 15:53:04,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1645 transitions. [2022-03-15 15:53:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:04,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:04,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:04,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-15 15:53:04,815 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1393132380, now seen corresponding path program 341 times [2022-03-15 15:53:04,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:04,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587816597] [2022-03-15 15:53:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:04,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:04,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:04,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587816597] [2022-03-15 15:53:04,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587816597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:04,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143768612] [2022-03-15 15:53:04,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:04,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:05,000 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:05,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-15 15:53:05,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:05,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:05,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:53:05,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:05,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:53:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:05,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:05,770 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:05,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:53:05,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:53:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:05,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143768612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:05,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:05,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:53:05,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098158988] [2022-03-15 15:53:05,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:05,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:53:05,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:53:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:05,851 INFO L87 Difference]: Start difference. First operand 592 states and 1645 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:06,342 INFO L93 Difference]: Finished difference Result 719 states and 1860 transitions. [2022-03-15 15:53:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:06,344 INFO L225 Difference]: With dead ends: 719 [2022-03-15 15:53:06,344 INFO L226 Difference]: Without dead ends: 699 [2022-03-15 15:53:06,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:53:06,344 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:06,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 280 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 660 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-03-15 15:53:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-15 15:53:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 590. [2022-03-15 15:53:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.7826825127334467) internal successors, (1639), 589 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1639 transitions. [2022-03-15 15:53:06,350 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1639 transitions. Word has length 18 [2022-03-15 15:53:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:06,350 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1639 transitions. [2022-03-15 15:53:06,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1639 transitions. [2022-03-15 15:53:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:06,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:06,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:06,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-03-15 15:53:06,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-03-15 15:53:06,552 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1980877702, now seen corresponding path program 342 times [2022-03-15 15:53:06,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:06,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382087029] [2022-03-15 15:53:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:06,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:06,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382087029] [2022-03-15 15:53:06,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382087029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:06,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78358167] [2022-03-15 15:53:06,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:06,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:06,689 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-15 15:53:06,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:06,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:06,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:06,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:06,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:06,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:53:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:06,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:07,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:07,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:53:07,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:07,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:53:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:07,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78358167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:07,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:07,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:53:07,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255051066] [2022-03-15 15:53:07,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:07,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:53:07,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:53:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:07,416 INFO L87 Difference]: Start difference. First operand 590 states and 1639 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:07,686 INFO L93 Difference]: Finished difference Result 656 states and 1750 transitions. [2022-03-15 15:53:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:53:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:07,687 INFO L225 Difference]: With dead ends: 656 [2022-03-15 15:53:07,687 INFO L226 Difference]: Without dead ends: 642 [2022-03-15 15:53:07,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:53:07,687 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:07,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 218 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2022-03-15 15:53:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-03-15 15:53:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 589. [2022-03-15 15:53:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.7823129251700682) internal successors, (1636), 588 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1636 transitions. [2022-03-15 15:53:07,693 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1636 transitions. Word has length 18 [2022-03-15 15:53:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:07,693 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1636 transitions. [2022-03-15 15:53:07,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1636 transitions. [2022-03-15 15:53:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:07,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:07,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:07,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:07,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:07,907 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1481390756, now seen corresponding path program 343 times [2022-03-15 15:53:07,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:07,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416133197] [2022-03-15 15:53:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:07,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:08,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:08,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416133197] [2022-03-15 15:53:08,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416133197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:08,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811342505] [2022-03-15 15:53:08,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:08,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:08,017 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:08,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-15 15:53:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:08,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:08,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:08,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:08,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:08,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:53:08,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:53:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:08,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811342505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:08,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:08,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:08,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89904775] [2022-03-15 15:53:08,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:08,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:08,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:08,511 INFO L87 Difference]: Start difference. First operand 589 states and 1636 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:09,088 INFO L93 Difference]: Finished difference Result 788 states and 2032 transitions. [2022-03-15 15:53:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:53:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:09,090 INFO L225 Difference]: With dead ends: 788 [2022-03-15 15:53:09,090 INFO L226 Difference]: Without dead ends: 768 [2022-03-15 15:53:09,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:53:09,090 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:09,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 366 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-15 15:53:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 596. [2022-03-15 15:53:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.788235294117647) internal successors, (1659), 595 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1659 transitions. [2022-03-15 15:53:09,097 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1659 transitions. Word has length 18 [2022-03-15 15:53:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:09,097 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1659 transitions. [2022-03-15 15:53:09,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1659 transitions. [2022-03-15 15:53:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:09,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:09,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:09,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-03-15 15:53:09,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-03-15 15:53:09,314 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash 746175632, now seen corresponding path program 344 times [2022-03-15 15:53:09,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:09,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951432166] [2022-03-15 15:53:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:09,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:09,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951432166] [2022-03-15 15:53:09,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951432166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:09,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302936697] [2022-03-15 15:53:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:09,529 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:09,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-15 15:53:09,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:09,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:09,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:09,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:09,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:09,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:09,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:09,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-15 15:53:10,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:10,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2022-03-15 15:53:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:10,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302936697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:10,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:10,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:10,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120610213] [2022-03-15 15:53:10,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:10,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:10,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:10,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:10,117 INFO L87 Difference]: Start difference. First operand 596 states and 1659 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:11,068 INFO L93 Difference]: Finished difference Result 791 states and 2033 transitions. [2022-03-15 15:53:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:53:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:11,070 INFO L225 Difference]: With dead ends: 791 [2022-03-15 15:53:11,070 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 15:53:11,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:53:11,076 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:11,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 304 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:53:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 15:53:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 596. [2022-03-15 15:53:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.791596638655462) internal successors, (1661), 595 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1661 transitions. [2022-03-15 15:53:11,084 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1661 transitions. Word has length 18 [2022-03-15 15:53:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:11,084 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1661 transitions. [2022-03-15 15:53:11,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1661 transitions. [2022-03-15 15:53:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:11,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:11,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:11,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:11,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:11,291 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1399995128, now seen corresponding path program 345 times [2022-03-15 15:53:11,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:11,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295328632] [2022-03-15 15:53:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:11,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:11,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295328632] [2022-03-15 15:53:11,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295328632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:11,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830720106] [2022-03-15 15:53:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:11,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:11,497 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:11,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-15 15:53:11,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:53:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:11,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:11,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:11,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:11,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:12,112 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:12,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:53:12,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:53:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:12,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830720106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:12,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:12,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:12,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206283967] [2022-03-15 15:53:12,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:12,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:12,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:12,191 INFO L87 Difference]: Start difference. First operand 596 states and 1661 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:13,537 INFO L93 Difference]: Finished difference Result 879 states and 2207 transitions. [2022-03-15 15:53:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:53:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:13,539 INFO L225 Difference]: With dead ends: 879 [2022-03-15 15:53:13,539 INFO L226 Difference]: Without dead ends: 839 [2022-03-15 15:53:13,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:53:13,539 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 121 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:13,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 389 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1018 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-03-15 15:53:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-03-15 15:53:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 605. [2022-03-15 15:53:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.802980132450331) internal successors, (1693), 604 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1693 transitions. [2022-03-15 15:53:13,546 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1693 transitions. Word has length 18 [2022-03-15 15:53:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:13,546 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1693 transitions. [2022-03-15 15:53:13,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1693 transitions. [2022-03-15 15:53:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:13,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:13,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:13,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:13,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:13,763 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -434800804, now seen corresponding path program 346 times [2022-03-15 15:53:13,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:13,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883629500] [2022-03-15 15:53:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:13,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:13,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883629500] [2022-03-15 15:53:13,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883629500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:13,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814933945] [2022-03-15 15:53:13,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:13,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:13,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:13,890 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:13,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-15 15:53:13,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:13,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:13,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:14,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:14,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:14,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:14,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:53:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:14,463 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:14,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-03-15 15:53:14,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 78 [2022-03-15 15:53:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:14,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814933945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:14,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:14,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:14,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576902134] [2022-03-15 15:53:14,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:14,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:14,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:14,527 INFO L87 Difference]: Start difference. First operand 605 states and 1693 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:15,111 INFO L93 Difference]: Finished difference Result 779 states and 2035 transitions. [2022-03-15 15:53:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:53:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:15,113 INFO L225 Difference]: With dead ends: 779 [2022-03-15 15:53:15,113 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 15:53:15,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:53:15,113 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:15,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 291 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 794 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-03-15 15:53:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 15:53:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 597. [2022-03-15 15:53:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 2.790268456375839) internal successors, (1663), 596 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1663 transitions. [2022-03-15 15:53:15,120 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1663 transitions. Word has length 18 [2022-03-15 15:53:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:15,120 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1663 transitions. [2022-03-15 15:53:15,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1663 transitions. [2022-03-15 15:53:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:15,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:15,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:15,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-03-15 15:53:15,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:15,336 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 788188048, now seen corresponding path program 347 times [2022-03-15 15:53:15,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:15,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890724658] [2022-03-15 15:53:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:15,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:15,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890724658] [2022-03-15 15:53:15,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890724658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:15,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324780825] [2022-03-15 15:53:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:15,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:15,470 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:15,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-15 15:53:15,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:15,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:15,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:15,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:15,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:15,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:15,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:15,988 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:15,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:53:15,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:53:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:16,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324780825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:16,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:16,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:16,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413928753] [2022-03-15 15:53:16,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:16,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:16,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:16,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:16,038 INFO L87 Difference]: Start difference. First operand 597 states and 1663 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:17,236 INFO L93 Difference]: Finished difference Result 745 states and 1947 transitions. [2022-03-15 15:53:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:53:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:17,237 INFO L225 Difference]: With dead ends: 745 [2022-03-15 15:53:17,237 INFO L226 Difference]: Without dead ends: 705 [2022-03-15 15:53:17,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:53:17,237 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:17,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 195 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 727 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-03-15 15:53:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-03-15 15:53:17,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 598. [2022-03-15 15:53:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.7906197654941374) internal successors, (1666), 597 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1666 transitions. [2022-03-15 15:53:17,244 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1666 transitions. Word has length 18 [2022-03-15 15:53:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:17,244 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1666 transitions. [2022-03-15 15:53:17,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1666 transitions. [2022-03-15 15:53:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:17,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:17,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:17,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-03-15 15:53:17,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:17,445 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1753382372, now seen corresponding path program 348 times [2022-03-15 15:53:17,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:17,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217386560] [2022-03-15 15:53:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:17,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:17,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217386560] [2022-03-15 15:53:17,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217386560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:17,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535047585] [2022-03-15 15:53:17,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:17,630 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:17,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-15 15:53:17,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:17,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:17,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:17,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:17,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:17,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:18,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:18,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:53:18,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:18,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:53:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:18,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535047585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:18,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:18,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:18,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832577892] [2022-03-15 15:53:18,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:18,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:18,373 INFO L87 Difference]: Start difference. First operand 598 states and 1666 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,651 INFO L93 Difference]: Finished difference Result 682 states and 1824 transitions. [2022-03-15 15:53:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,653 INFO L225 Difference]: With dead ends: 682 [2022-03-15 15:53:18,653 INFO L226 Difference]: Without dead ends: 668 [2022-03-15 15:53:18,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:53:18,653 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 192 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-15 15:53:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-15 15:53:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 596. [2022-03-15 15:53:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.788235294117647) internal successors, (1659), 595 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1659 transitions. [2022-03-15 15:53:18,659 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1659 transitions. Word has length 18 [2022-03-15 15:53:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,659 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1659 transitions. [2022-03-15 15:53:18,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1659 transitions. [2022-03-15 15:53:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:18,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-03-15 15:53:18,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-03-15 15:53:18,876 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1218152570, now seen corresponding path program 349 times [2022-03-15 15:53:18,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432899237] [2022-03-15 15:53:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:19,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:19,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432899237] [2022-03-15 15:53:19,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432899237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:19,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373526019] [2022-03-15 15:53:19,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:19,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:19,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:19,054 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:19,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-15 15:53:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:19,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:19,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:19,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:19,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:19,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:19,759 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:19,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:53:19,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:53:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:19,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373526019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:19,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:19,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:19,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044376810] [2022-03-15 15:53:19,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:19,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:19,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:19,837 INFO L87 Difference]: Start difference. First operand 596 states and 1659 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:20,406 INFO L93 Difference]: Finished difference Result 728 states and 1907 transitions. [2022-03-15 15:53:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:53:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:20,408 INFO L225 Difference]: With dead ends: 728 [2022-03-15 15:53:20,408 INFO L226 Difference]: Without dead ends: 708 [2022-03-15 15:53:20,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:53:20,408 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:20,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 255 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 663 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-03-15 15:53:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-03-15 15:53:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 600. [2022-03-15 15:53:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.7929883138564273) internal successors, (1673), 599 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1673 transitions. [2022-03-15 15:53:20,415 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1673 transitions. Word has length 18 [2022-03-15 15:53:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:20,415 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1673 transitions. [2022-03-15 15:53:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1673 transitions. [2022-03-15 15:53:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:20,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:20,417 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:20,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-03-15 15:53:20,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-03-15 15:53:20,627 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:20,627 INFO L85 PathProgramCache]: Analyzing trace with hash -97610232, now seen corresponding path program 350 times [2022-03-15 15:53:20,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:20,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022448838] [2022-03-15 15:53:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:20,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:20,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:20,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022448838] [2022-03-15 15:53:20,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022448838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:20,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99647735] [2022-03-15 15:53:20,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:20,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:20,858 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:20,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-15 15:53:20,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:20,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:21,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:21,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:21,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:21,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:21,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:21,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:53:21,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:21,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:53:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:21,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99647735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:21,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:21,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:21,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181822082] [2022-03-15 15:53:21,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:21,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:21,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:21,926 INFO L87 Difference]: Start difference. First operand 600 states and 1673 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:22,145 INFO L93 Difference]: Finished difference Result 660 states and 1799 transitions. [2022-03-15 15:53:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:22,146 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:22,147 INFO L225 Difference]: With dead ends: 660 [2022-03-15 15:53:22,147 INFO L226 Difference]: Without dead ends: 653 [2022-03-15 15:53:22,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:22,147 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:22,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 138 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 405 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-03-15 15:53:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-15 15:53:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 603. [2022-03-15 15:53:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.7940199335548175) internal successors, (1682), 602 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1682 transitions. [2022-03-15 15:53:22,155 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1682 transitions. Word has length 18 [2022-03-15 15:53:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:22,155 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 1682 transitions. [2022-03-15 15:53:22,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1682 transitions. [2022-03-15 15:53:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:22,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:22,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:22,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:22,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-15 15:53:22,357 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash 867584092, now seen corresponding path program 351 times [2022-03-15 15:53:22,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:22,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330281097] [2022-03-15 15:53:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:22,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:22,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330281097] [2022-03-15 15:53:22,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330281097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:22,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481020303] [2022-03-15 15:53:22,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:22,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:22,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:22,574 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:22,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-15 15:53:22,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:22,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:22,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:22,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:22,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:22,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:23,395 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:23,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 103 [2022-03-15 15:53:23,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2022-03-15 15:53:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:23,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481020303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:23,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:23,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:23,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291416879] [2022-03-15 15:53:23,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:23,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:23,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:23,449 INFO L87 Difference]: Start difference. First operand 603 states and 1682 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:23,691 INFO L93 Difference]: Finished difference Result 662 states and 1797 transitions. [2022-03-15 15:53:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:23,692 INFO L225 Difference]: With dead ends: 662 [2022-03-15 15:53:23,692 INFO L226 Difference]: Without dead ends: 651 [2022-03-15 15:53:23,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:23,693 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:23,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 155 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 492 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-03-15 15:53:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-15 15:53:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 602. [2022-03-15 15:53:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.793677204658902) internal successors, (1679), 601 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1679 transitions. [2022-03-15 15:53:23,699 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1679 transitions. Word has length 18 [2022-03-15 15:53:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:23,699 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1679 transitions. [2022-03-15 15:53:23,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1679 transitions. [2022-03-15 15:53:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:23,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:23,700 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:23,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:23,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-15 15:53:23,903 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash 652984878, now seen corresponding path program 352 times [2022-03-15 15:53:23,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:23,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154027744] [2022-03-15 15:53:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:23,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:23,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154027744] [2022-03-15 15:53:23,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154027744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:23,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300457774] [2022-03-15 15:53:23,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:23,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:23,965 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:23,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-15 15:53:23,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:23,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:53:23,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:24,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:24,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:24,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:24,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:53:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:24,171 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:24,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300457774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:24,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:24,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:53:24,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413387387] [2022-03-15 15:53:24,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:24,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:24,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:24,179 INFO L87 Difference]: Start difference. First operand 602 states and 1679 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:24,229 INFO L93 Difference]: Finished difference Result 656 states and 1788 transitions. [2022-03-15 15:53:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:53:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:24,230 INFO L225 Difference]: With dead ends: 656 [2022-03-15 15:53:24,230 INFO L226 Difference]: Without dead ends: 656 [2022-03-15 15:53:24,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:24,231 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:24,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 103 Unchecked, 0.0s Time] [2022-03-15 15:53:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-15 15:53:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 598. [2022-03-15 15:53:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.792294807370184) internal successors, (1667), 597 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1667 transitions. [2022-03-15 15:53:24,236 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1667 transitions. Word has length 18 [2022-03-15 15:53:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:24,237 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1667 transitions. [2022-03-15 15:53:24,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1667 transitions. [2022-03-15 15:53:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:24,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:24,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:24,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:24,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:24,453 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 332354290, now seen corresponding path program 353 times [2022-03-15 15:53:24,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:24,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901268525] [2022-03-15 15:53:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:24,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901268525] [2022-03-15 15:53:24,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901268525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:24,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211081050] [2022-03-15 15:53:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:24,642 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:24,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-15 15:53:24,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:24,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:24,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:24,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:24,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:53:24,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:24,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:25,410 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:53:25,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 115 [2022-03-15 15:53:25,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 78 [2022-03-15 15:53:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:25,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211081050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:25,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:25,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:25,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151210329] [2022-03-15 15:53:25,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:25,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:25,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:25,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:25,469 INFO L87 Difference]: Start difference. First operand 598 states and 1667 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:25,739 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2022-03-15 15:53:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:53:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:25,740 INFO L225 Difference]: With dead ends: 660 [2022-03-15 15:53:25,740 INFO L226 Difference]: Without dead ends: 647 [2022-03-15 15:53:25,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:25,740 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:25,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 190 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 495 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-03-15 15:53:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-03-15 15:53:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 597. [2022-03-15 15:53:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 2.791946308724832) internal successors, (1664), 596 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1664 transitions. [2022-03-15 15:53:25,746 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1664 transitions. Word has length 18 [2022-03-15 15:53:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1664 transitions. [2022-03-15 15:53:25,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1664 transitions. [2022-03-15 15:53:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:25,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:25,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:25,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:25,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-03-15 15:53:25,963 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash 920099612, now seen corresponding path program 354 times [2022-03-15 15:53:25,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:25,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933634685] [2022-03-15 15:53:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:26,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:26,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933634685] [2022-03-15 15:53:26,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933634685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:26,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872884315] [2022-03-15 15:53:26,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:26,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:26,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:26,102 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:26,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-15 15:53:26,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:26,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:26,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:26,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:53:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:26,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:26,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:26,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 15:53:26,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:26,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 15:53:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:26,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872884315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:26,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:26,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:26,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49832937] [2022-03-15 15:53:26,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:26,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:26,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:26,985 INFO L87 Difference]: Start difference. First operand 597 states and 1664 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:27,261 INFO L93 Difference]: Finished difference Result 662 states and 1791 transitions. [2022-03-15 15:53:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:53:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:27,262 INFO L225 Difference]: With dead ends: 662 [2022-03-15 15:53:27,262 INFO L226 Difference]: Without dead ends: 655 [2022-03-15 15:53:27,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:27,263 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:27,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 413 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-03-15 15:53:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-15 15:53:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 596. [2022-03-15 15:53:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.791596638655462) internal successors, (1661), 595 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1661 transitions. [2022-03-15 15:53:27,269 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1661 transitions. Word has length 18 [2022-03-15 15:53:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:27,269 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1661 transitions. [2022-03-15 15:53:27,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1661 transitions. [2022-03-15 15:53:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:27,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:27,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:27,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-03-15 15:53:27,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:27,470 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2084928434, now seen corresponding path program 355 times [2022-03-15 15:53:27,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:27,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558887777] [2022-03-15 15:53:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:27,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:27,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:27,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558887777] [2022-03-15 15:53:27,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558887777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:27,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044760364] [2022-03-15 15:53:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:27,739 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:27,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-15 15:53:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:27,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:27,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:27,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:28,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:28,553 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:28,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 63 [2022-03-15 15:53:28,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2022-03-15 15:53:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:28,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044760364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:28,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:28,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:28,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980171949] [2022-03-15 15:53:28,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:28,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:28,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:28,576 INFO L87 Difference]: Start difference. First operand 596 states and 1661 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:28,851 INFO L93 Difference]: Finished difference Result 726 states and 1963 transitions. [2022-03-15 15:53:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:28,852 INFO L225 Difference]: With dead ends: 726 [2022-03-15 15:53:28,852 INFO L226 Difference]: Without dead ends: 702 [2022-03-15 15:53:28,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:53:28,852 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:28,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 199 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 335 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-15 15:53:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-15 15:53:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 602. [2022-03-15 15:53:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.7953410981697173) internal successors, (1680), 601 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1680 transitions. [2022-03-15 15:53:28,859 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1680 transitions. Word has length 18 [2022-03-15 15:53:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:28,859 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1680 transitions. [2022-03-15 15:53:28,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1680 transitions. [2022-03-15 15:53:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:28,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:28,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:28,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-03-15 15:53:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:29,075 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -673389732, now seen corresponding path program 356 times [2022-03-15 15:53:29,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:29,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335174966] [2022-03-15 15:53:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:29,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:29,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335174966] [2022-03-15 15:53:29,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335174966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:29,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843569819] [2022-03-15 15:53:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:29,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:29,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:29,249 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-15 15:53:29,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:29,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:29,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:29,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:29,902 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:29,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:53:29,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:53:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:29,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843569819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:29,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:29,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:29,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835372107] [2022-03-15 15:53:29,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:29,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:29,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:29,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:29,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:29,930 INFO L87 Difference]: Start difference. First operand 602 states and 1680 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:30,065 INFO L93 Difference]: Finished difference Result 697 states and 1905 transitions. [2022-03-15 15:53:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:30,066 INFO L225 Difference]: With dead ends: 697 [2022-03-15 15:53:30,066 INFO L226 Difference]: Without dead ends: 690 [2022-03-15 15:53:30,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:30,067 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:30,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 437 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-15 15:53:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-03-15 15:53:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 602. [2022-03-15 15:53:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.7953410981697173) internal successors, (1680), 601 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1680 transitions. [2022-03-15 15:53:30,074 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1680 transitions. Word has length 18 [2022-03-15 15:53:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:30,074 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1680 transitions. [2022-03-15 15:53:30,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1680 transitions. [2022-03-15 15:53:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:30,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:30,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:30,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:30,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:30,290 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1244844538, now seen corresponding path program 357 times [2022-03-15 15:53:30,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:30,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546708806] [2022-03-15 15:53:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:30,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:30,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:30,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546708806] [2022-03-15 15:53:30,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546708806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:30,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593058757] [2022-03-15 15:53:30,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:30,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:30,497 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:30,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-03-15 15:53:30,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:30,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:30,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:30,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:30,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:30,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:31,255 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:31,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 65 [2022-03-15 15:53:31,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-03-15 15:53:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:31,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593058757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:31,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:31,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:31,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80172921] [2022-03-15 15:53:31,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:31,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:31,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:31,288 INFO L87 Difference]: Start difference. First operand 602 states and 1680 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:31,471 INFO L93 Difference]: Finished difference Result 725 states and 1995 transitions. [2022-03-15 15:53:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:53:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:31,473 INFO L225 Difference]: With dead ends: 725 [2022-03-15 15:53:31,473 INFO L226 Difference]: Without dead ends: 714 [2022-03-15 15:53:31,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:31,473 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:31,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 151 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 363 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-03-15 15:53:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-15 15:53:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 602. [2022-03-15 15:53:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.793677204658902) internal successors, (1679), 601 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1679 transitions. [2022-03-15 15:53:31,480 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1679 transitions. Word has length 18 [2022-03-15 15:53:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:31,480 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1679 transitions. [2022-03-15 15:53:31,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1679 transitions. [2022-03-15 15:53:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:31,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:31,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:31,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-03-15 15:53:31,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:31,681 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1780074340, now seen corresponding path program 358 times [2022-03-15 15:53:31,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:31,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046109471] [2022-03-15 15:53:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:31,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:31,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046109471] [2022-03-15 15:53:31,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046109471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:31,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187373673] [2022-03-15 15:53:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:31,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:31,904 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:31,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-03-15 15:53:31,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:32,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:32,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:32,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:53:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:32,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:32,619 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:32,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 65 [2022-03-15 15:53:32,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-03-15 15:53:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:32,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187373673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:32,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:32,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:32,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051718316] [2022-03-15 15:53:32,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:32,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:32,651 INFO L87 Difference]: Start difference. First operand 602 states and 1679 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:32,798 INFO L93 Difference]: Finished difference Result 701 states and 1908 transitions. [2022-03-15 15:53:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:32,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:32,800 INFO L225 Difference]: With dead ends: 701 [2022-03-15 15:53:32,800 INFO L226 Difference]: Without dead ends: 688 [2022-03-15 15:53:32,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:32,800 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:32,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 175 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 393 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-03-15 15:53:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-15 15:53:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 602. [2022-03-15 15:53:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.7920133111480867) internal successors, (1678), 601 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1678 transitions. [2022-03-15 15:53:32,806 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1678 transitions. Word has length 18 [2022-03-15 15:53:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:32,806 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1678 transitions. [2022-03-15 15:53:32,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1678 transitions. [2022-03-15 15:53:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:32,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:32,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:32,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:33,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:33,018 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1192329018, now seen corresponding path program 359 times [2022-03-15 15:53:33,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:33,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380264550] [2022-03-15 15:53:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:33,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:33,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:33,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380264550] [2022-03-15 15:53:33,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380264550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:33,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323634459] [2022-03-15 15:53:33,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:33,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:33,229 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:33,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-03-15 15:53:33,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:33,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:33,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:33,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:33,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:53:33,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:33,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:53:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:33,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:33,827 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:33,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 73 [2022-03-15 15:53:33,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2022-03-15 15:53:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:33,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323634459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:33,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:33,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:33,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341924098] [2022-03-15 15:53:33,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:33,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:33,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:33,853 INFO L87 Difference]: Start difference. First operand 602 states and 1678 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:33,984 INFO L93 Difference]: Finished difference Result 703 states and 1910 transitions. [2022-03-15 15:53:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:53:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:33,985 INFO L225 Difference]: With dead ends: 703 [2022-03-15 15:53:33,985 INFO L226 Difference]: Without dead ends: 688 [2022-03-15 15:53:33,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:33,985 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:33,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 191 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 419 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2022-03-15 15:53:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-15 15:53:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 602. [2022-03-15 15:53:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.7903494176372714) internal successors, (1677), 601 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1677 transitions. [2022-03-15 15:53:33,993 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1677 transitions. Word has length 18 [2022-03-15 15:53:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:33,993 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1677 transitions. [2022-03-15 15:53:33,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1677 transitions. [2022-03-15 15:53:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:33,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:33,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:34,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:34,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-03-15 15:53:34,195 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1773940858, now seen corresponding path program 360 times [2022-03-15 15:53:34,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:34,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018517148] [2022-03-15 15:53:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:34,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:34,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018517148] [2022-03-15 15:53:34,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018517148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:34,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650088890] [2022-03-15 15:53:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:34,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:34,352 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:34,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-03-15 15:53:34,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:34,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:34,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:34,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:53:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:34,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:35,009 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:35,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-03-15 15:53:35,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-03-15 15:53:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:35,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650088890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:35,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:35,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:35,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946247039] [2022-03-15 15:53:35,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:35,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:35,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:35,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:35,038 INFO L87 Difference]: Start difference. First operand 602 states and 1677 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:35,267 INFO L93 Difference]: Finished difference Result 749 states and 2031 transitions. [2022-03-15 15:53:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:53:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:35,292 INFO L225 Difference]: With dead ends: 749 [2022-03-15 15:53:35,292 INFO L226 Difference]: Without dead ends: 742 [2022-03-15 15:53:35,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:53:35,293 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:35,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 187 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 221 Unchecked, 0.1s Time] [2022-03-15 15:53:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-15 15:53:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 604. [2022-03-15 15:53:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.7860696517412937) internal successors, (1680), 603 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1680 transitions. [2022-03-15 15:53:35,300 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1680 transitions. Word has length 18 [2022-03-15 15:53:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:35,300 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1680 transitions. [2022-03-15 15:53:35,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1680 transitions. [2022-03-15 15:53:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:35,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:35,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:35,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:35,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-03-15 15:53:35,502 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1726107684, now seen corresponding path program 361 times [2022-03-15 15:53:35,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:35,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204875856] [2022-03-15 15:53:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:35,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:35,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204875856] [2022-03-15 15:53:35,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204875856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:35,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108413758] [2022-03-15 15:53:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:35,638 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:35,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-03-15 15:53:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:53:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:35,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:35,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:53:35,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:35,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:53:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:35,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:36,254 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:36,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:53:36,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:53:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:36,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108413758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:36,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:36,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:36,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821032577] [2022-03-15 15:53:36,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:36,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:36,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:36,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:36,307 INFO L87 Difference]: Start difference. First operand 604 states and 1680 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:36,456 INFO L93 Difference]: Finished difference Result 692 states and 1887 transitions. [2022-03-15 15:53:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:53:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:36,457 INFO L225 Difference]: With dead ends: 692 [2022-03-15 15:53:36,457 INFO L226 Difference]: Without dead ends: 682 [2022-03-15 15:53:36,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:36,457 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:36,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 145 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 413 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-03-15 15:53:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-15 15:53:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 602. [2022-03-15 15:53:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.788685524126456) internal successors, (1676), 601 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1676 transitions. [2022-03-15 15:53:36,464 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1676 transitions. Word has length 18 [2022-03-15 15:53:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:36,464 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1676 transitions. [2022-03-15 15:53:36,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1676 transitions. [2022-03-15 15:53:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:36,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:36,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:36,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-03-15 15:53:36,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-03-15 15:53:36,681 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1620701506, now seen corresponding path program 362 times [2022-03-15 15:53:36,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:36,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301866766] [2022-03-15 15:53:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:36,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:36,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301866766] [2022-03-15 15:53:36,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301866766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:36,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619248791] [2022-03-15 15:53:36,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:36,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:36,813 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:36,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-03-15 15:53:36,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:36,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 15:53:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:36,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-15 15:53:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:36,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:37,360 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:37,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:37,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 15:53:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:37,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619248791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:37,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:37,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:37,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528090905] [2022-03-15 15:53:37,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:37,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:37,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:37,379 INFO L87 Difference]: Start difference. First operand 602 states and 1676 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:37,698 INFO L93 Difference]: Finished difference Result 727 states and 1973 transitions. [2022-03-15 15:53:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:37,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:37,700 INFO L225 Difference]: With dead ends: 727 [2022-03-15 15:53:37,700 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:53:37,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:37,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:37,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 184 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:53:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 600. [2022-03-15 15:53:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.7946577629382303) internal successors, (1674), 599 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1674 transitions. [2022-03-15 15:53:37,707 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1674 transitions. Word has length 18 [2022-03-15 15:53:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:37,707 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1674 transitions. [2022-03-15 15:53:37,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1674 transitions. [2022-03-15 15:53:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:37,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:37,708 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:37,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-03-15 15:53:37,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-03-15 15:53:37,911 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2012643281, now seen corresponding path program 363 times [2022-03-15 15:53:37,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:37,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957289082] [2022-03-15 15:53:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:37,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:37,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:37,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957289082] [2022-03-15 15:53:37,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957289082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:37,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721966015] [2022-03-15 15:53:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:37,987 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:37,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-03-15 15:53:38,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:38,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:38,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:53:38,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:53:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:38,183 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:38,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721966015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:38,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:38,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-15 15:53:38,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931440621] [2022-03-15 15:53:38,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:38,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:53:38,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:38,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:53:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:53:38,192 INFO L87 Difference]: Start difference. First operand 600 states and 1674 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:38,329 INFO L93 Difference]: Finished difference Result 840 states and 2354 transitions. [2022-03-15 15:53:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:38,330 INFO L225 Difference]: With dead ends: 840 [2022-03-15 15:53:38,330 INFO L226 Difference]: Without dead ends: 840 [2022-03-15 15:53:38,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:53:38,331 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:38,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 185 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 520 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-15 15:53:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-15 15:53:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 605. [2022-03-15 15:53:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.7897350993377485) internal successors, (1685), 604 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1685 transitions. [2022-03-15 15:53:38,338 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1685 transitions. Word has length 19 [2022-03-15 15:53:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:38,338 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1685 transitions. [2022-03-15 15:53:38,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1685 transitions. [2022-03-15 15:53:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:38,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:38,339 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:38,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-03-15 15:53:38,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:38,554 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1300776667, now seen corresponding path program 364 times [2022-03-15 15:53:38,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:38,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746626775] [2022-03-15 15:53:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:38,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746626775] [2022-03-15 15:53:38,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746626775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:38,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926179478] [2022-03-15 15:53:38,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:38,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:38,651 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:38,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-03-15 15:53:38,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:38,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:38,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:38,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:38,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:53:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:38,914 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:38,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926179478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:38,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:38,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:38,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483168043] [2022-03-15 15:53:38,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:38,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:38,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:38,923 INFO L87 Difference]: Start difference. First operand 605 states and 1685 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:38,981 INFO L93 Difference]: Finished difference Result 750 states and 2046 transitions. [2022-03-15 15:53:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:53:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:38,982 INFO L225 Difference]: With dead ends: 750 [2022-03-15 15:53:38,982 INFO L226 Difference]: Without dead ends: 750 [2022-03-15 15:53:38,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:38,982 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:38,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 159 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-03-15 15:53:38,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-15 15:53:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 612. [2022-03-15 15:53:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.785597381342062) internal successors, (1702), 611 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1702 transitions. [2022-03-15 15:53:38,989 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1702 transitions. Word has length 19 [2022-03-15 15:53:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:38,989 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1702 transitions. [2022-03-15 15:53:38,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1702 transitions. [2022-03-15 15:53:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:38,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:38,990 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:39,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:39,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:39,203 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2076240439, now seen corresponding path program 365 times [2022-03-15 15:53:39,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:39,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602231165] [2022-03-15 15:53:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:39,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:39,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602231165] [2022-03-15 15:53:39,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602231165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:39,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758922007] [2022-03-15 15:53:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:39,295 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:39,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-03-15 15:53:39,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:39,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:39,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:39,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:39,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:39,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:53:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:39,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:39,653 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:39,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:39,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758922007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:39,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:39,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:39,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872702604] [2022-03-15 15:53:39,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:39,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:39,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:39,665 INFO L87 Difference]: Start difference. First operand 612 states and 1702 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:39,767 INFO L93 Difference]: Finished difference Result 715 states and 1953 transitions. [2022-03-15 15:53:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:53:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:39,769 INFO L225 Difference]: With dead ends: 715 [2022-03-15 15:53:39,769 INFO L226 Difference]: Without dead ends: 715 [2022-03-15 15:53:39,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:39,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:39,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 129 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-03-15 15:53:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-15 15:53:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 617. [2022-03-15 15:53:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.780844155844156) internal successors, (1713), 616 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1713 transitions. [2022-03-15 15:53:39,776 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1713 transitions. Word has length 19 [2022-03-15 15:53:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:39,786 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1713 transitions. [2022-03-15 15:53:39,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1713 transitions. [2022-03-15 15:53:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:39,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:39,787 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:39,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:39,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2022-03-15 15:53:39,988 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 384061157, now seen corresponding path program 366 times [2022-03-15 15:53:39,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:39,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920400042] [2022-03-15 15:53:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:39,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:40,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920400042] [2022-03-15 15:53:40,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920400042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:40,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691769024] [2022-03-15 15:53:40,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:40,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:40,083 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:40,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-03-15 15:53:40,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:40,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:40,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:40,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:53:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:40,435 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:40,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691769024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:40,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:40,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:40,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978026683] [2022-03-15 15:53:40,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:40,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:40,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:40,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:40,446 INFO L87 Difference]: Start difference. First operand 617 states and 1713 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:40,543 INFO L93 Difference]: Finished difference Result 728 states and 1980 transitions. [2022-03-15 15:53:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:53:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:40,545 INFO L225 Difference]: With dead ends: 728 [2022-03-15 15:53:40,545 INFO L226 Difference]: Without dead ends: 728 [2022-03-15 15:53:40,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:40,545 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:40,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 158 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 317 Invalid, 0 Unknown, 205 Unchecked, 0.1s Time] [2022-03-15 15:53:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-15 15:53:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 615. [2022-03-15 15:53:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.7866449511400653) internal successors, (1711), 614 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1711 transitions. [2022-03-15 15:53:40,551 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1711 transitions. Word has length 19 [2022-03-15 15:53:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:40,552 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1711 transitions. [2022-03-15 15:53:40,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1711 transitions. [2022-03-15 15:53:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:40,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:40,552 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:40,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:40,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:40,767 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 933294979, now seen corresponding path program 367 times [2022-03-15 15:53:40,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:40,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257502283] [2022-03-15 15:53:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:40,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257502283] [2022-03-15 15:53:40,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257502283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:40,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569379030] [2022-03-15 15:53:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:40,896 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:40,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-03-15 15:53:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:41,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:41,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:53:41,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:41,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:53:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:41,161 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:41,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:53:41,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:53:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569379030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:41,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:41,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:53:41,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294686479] [2022-03-15 15:53:41,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:41,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:53:41,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:53:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:41,175 INFO L87 Difference]: Start difference. First operand 615 states and 1711 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:41,382 INFO L93 Difference]: Finished difference Result 712 states and 1937 transitions. [2022-03-15 15:53:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:53:41,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:41,383 INFO L225 Difference]: With dead ends: 712 [2022-03-15 15:53:41,383 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 15:53:41,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:41,384 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:41,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 145 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-03-15 15:53:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 15:53:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 613. [2022-03-15 15:53:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.787581699346405) internal successors, (1706), 612 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1706 transitions. [2022-03-15 15:53:41,390 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1706 transitions. Word has length 19 [2022-03-15 15:53:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:41,390 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1706 transitions. [2022-03-15 15:53:41,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1706 transitions. [2022-03-15 15:53:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:41,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:41,391 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:41,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:41,607 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -388989487, now seen corresponding path program 368 times [2022-03-15 15:53:41,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:41,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718584669] [2022-03-15 15:53:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:41,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718584669] [2022-03-15 15:53:41,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718584669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:41,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828231302] [2022-03-15 15:53:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:41,678 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-03-15 15:53:41,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:41,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:41,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:41,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:41,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:53:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:41,989 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:41,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828231302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:41,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:41,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:41,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845527156] [2022-03-15 15:53:42,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:42,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:42,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:42,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:42,000 INFO L87 Difference]: Start difference. First operand 613 states and 1706 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:42,084 INFO L93 Difference]: Finished difference Result 745 states and 2030 transitions. [2022-03-15 15:53:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:53:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:42,085 INFO L225 Difference]: With dead ends: 745 [2022-03-15 15:53:42,085 INFO L226 Difference]: Without dead ends: 745 [2022-03-15 15:53:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:42,086 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:42,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 161 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 212 Unchecked, 0.1s Time] [2022-03-15 15:53:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-03-15 15:53:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 617. [2022-03-15 15:53:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.7857142857142856) internal successors, (1716), 616 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1716 transitions. [2022-03-15 15:53:42,093 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1716 transitions. Word has length 19 [2022-03-15 15:53:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:42,093 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1716 transitions. [2022-03-15 15:53:42,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1716 transitions. [2022-03-15 15:53:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:42,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:42,093 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:42,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:42,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:42,309 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2134274981, now seen corresponding path program 369 times [2022-03-15 15:53:42,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:42,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807653367] [2022-03-15 15:53:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:42,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:42,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:42,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807653367] [2022-03-15 15:53:42,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807653367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:42,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568429886] [2022-03-15 15:53:42,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:42,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:42,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:42,413 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:42,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-03-15 15:53:42,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:53:42,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:42,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:42,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:53:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:42,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:42,811 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:42,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:42,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568429886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:42,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:42,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:53:42,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835657077] [2022-03-15 15:53:42,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:42,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:53:42,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:42,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:53:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:42,824 INFO L87 Difference]: Start difference. First operand 617 states and 1716 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:42,951 INFO L93 Difference]: Finished difference Result 722 states and 1957 transitions. [2022-03-15 15:53:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:42,953 INFO L225 Difference]: With dead ends: 722 [2022-03-15 15:53:42,953 INFO L226 Difference]: Without dead ends: 722 [2022-03-15 15:53:42,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:42,953 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:42,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 196 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 239 Unchecked, 0.1s Time] [2022-03-15 15:53:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-15 15:53:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 617. [2022-03-15 15:53:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.7857142857142856) internal successors, (1716), 616 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1716 transitions. [2022-03-15 15:53:42,960 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1716 transitions. Word has length 19 [2022-03-15 15:53:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:42,960 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1716 transitions. [2022-03-15 15:53:42,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1716 transitions. [2022-03-15 15:53:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:42,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:42,961 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:42,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-03-15 15:53:43,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:43,161 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash -542647557, now seen corresponding path program 370 times [2022-03-15 15:53:43,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:43,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538961988] [2022-03-15 15:53:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:43,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:43,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538961988] [2022-03-15 15:53:43,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538961988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:43,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242617884] [2022-03-15 15:53:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:43,271 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-03-15 15:53:43,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:43,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:43,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:43,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:43,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:43,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:43,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:43,593 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:43,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:53:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:43,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242617884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:43,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:43,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:43,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984226716] [2022-03-15 15:53:43,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:43,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:43,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:43,604 INFO L87 Difference]: Start difference. First operand 617 states and 1716 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:43,690 INFO L93 Difference]: Finished difference Result 698 states and 1923 transitions. [2022-03-15 15:53:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:43,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:43,691 INFO L225 Difference]: With dead ends: 698 [2022-03-15 15:53:43,691 INFO L226 Difference]: Without dead ends: 698 [2022-03-15 15:53:43,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:43,692 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:43,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 128 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-03-15 15:53:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-15 15:53:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 619. [2022-03-15 15:53:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.7831715210355985) internal successors, (1720), 618 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1720 transitions. [2022-03-15 15:53:43,698 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1720 transitions. Word has length 19 [2022-03-15 15:53:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:43,698 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1720 transitions. [2022-03-15 15:53:43,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1720 transitions. [2022-03-15 15:53:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:43,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:43,699 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:43,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:43,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-03-15 15:53:43,915 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash 817469183, now seen corresponding path program 371 times [2022-03-15 15:53:43,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:43,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721638510] [2022-03-15 15:53:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:43,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:44,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:44,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721638510] [2022-03-15 15:53:44,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721638510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:44,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963596774] [2022-03-15 15:53:44,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:44,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:44,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:44,046 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:44,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-03-15 15:53:44,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:53:44,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:44,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:44,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:44,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:44,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:53:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:44,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:44,467 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:44,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:53:44,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:53:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:44,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963596774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:44,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:44,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:44,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265951658] [2022-03-15 15:53:44,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:44,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:44,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:44,489 INFO L87 Difference]: Start difference. First operand 619 states and 1720 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:44,705 INFO L93 Difference]: Finished difference Result 732 states and 1977 transitions. [2022-03-15 15:53:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:53:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:44,706 INFO L225 Difference]: With dead ends: 732 [2022-03-15 15:53:44,706 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 15:53:44,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:53:44,706 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:44,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 207 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 404 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-03-15 15:53:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 15:53:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 620. [2022-03-15 15:53:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.7819063004846525) internal successors, (1722), 619 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1722 transitions. [2022-03-15 15:53:44,713 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1722 transitions. Word has length 19 [2022-03-15 15:53:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:44,713 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1722 transitions. [2022-03-15 15:53:44,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1722 transitions. [2022-03-15 15:53:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:44,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:44,714 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:44,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-03-15 15:53:44,927 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1937243521, now seen corresponding path program 372 times [2022-03-15 15:53:44,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:44,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626821609] [2022-03-15 15:53:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:45,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:45,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626821609] [2022-03-15 15:53:45,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626821609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:45,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191171371] [2022-03-15 15:53:45,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:45,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:45,030 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:45,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-03-15 15:53:45,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:45,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:45,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:45,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:45,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:45,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:45,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:45,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:45,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191171371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:45,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:45,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:45,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111006072] [2022-03-15 15:53:45,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:45,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:45,402 INFO L87 Difference]: Start difference. First operand 620 states and 1722 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:45,532 INFO L93 Difference]: Finished difference Result 688 states and 1867 transitions. [2022-03-15 15:53:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:53:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:45,533 INFO L225 Difference]: With dead ends: 688 [2022-03-15 15:53:45,533 INFO L226 Difference]: Without dead ends: 688 [2022-03-15 15:53:45,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:45,533 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:45,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 137 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 361 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-03-15 15:53:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-15 15:53:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 623. [2022-03-15 15:53:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 2.782958199356913) internal successors, (1731), 622 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1731 transitions. [2022-03-15 15:53:45,539 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1731 transitions. Word has length 19 [2022-03-15 15:53:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:45,539 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1731 transitions. [2022-03-15 15:53:45,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1731 transitions. [2022-03-15 15:53:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:45,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:45,540 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:45,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-03-15 15:53:45,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:45,744 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 296828125, now seen corresponding path program 373 times [2022-03-15 15:53:45,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:45,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34734122] [2022-03-15 15:53:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:45,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:45,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34734122] [2022-03-15 15:53:45,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34734122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:45,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659577530] [2022-03-15 15:53:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:45,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:45,842 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:45,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-03-15 15:53:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:46,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:46,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:53:46,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:46,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:53:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:46,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:46,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:53:46,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:46,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:53:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659577530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:46,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:46,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-15 15:53:46,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897918246] [2022-03-15 15:53:46,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:46,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:53:46,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:53:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:53:46,187 INFO L87 Difference]: Start difference. First operand 623 states and 1731 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:46,335 INFO L93 Difference]: Finished difference Result 664 states and 1816 transitions. [2022-03-15 15:53:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:46,336 INFO L225 Difference]: With dead ends: 664 [2022-03-15 15:53:46,336 INFO L226 Difference]: Without dead ends: 655 [2022-03-15 15:53:46,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:53:46,336 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:46,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 132 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 306 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-03-15 15:53:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-15 15:53:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 619. [2022-03-15 15:53:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.7880258899676376) internal successors, (1723), 618 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1723 transitions. [2022-03-15 15:53:46,343 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1723 transitions. Word has length 19 [2022-03-15 15:53:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:46,343 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1723 transitions. [2022-03-15 15:53:46,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1723 transitions. [2022-03-15 15:53:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:46,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:46,343 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:46,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-03-15 15:53:46,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-03-15 15:53:46,559 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1025456341, now seen corresponding path program 374 times [2022-03-15 15:53:46,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:46,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870553293] [2022-03-15 15:53:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:46,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870553293] [2022-03-15 15:53:46,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870553293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:46,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455321437] [2022-03-15 15:53:46,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:46,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:46,636 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:46,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-03-15 15:53:46,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:46,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:46,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:46,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:53:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:46,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:46,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:46,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:46,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455321437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:46,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:46,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:46,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296207019] [2022-03-15 15:53:46,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:46,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:46,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:46,917 INFO L87 Difference]: Start difference. First operand 619 states and 1723 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:47,000 INFO L93 Difference]: Finished difference Result 667 states and 1828 transitions. [2022-03-15 15:53:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:47,001 INFO L225 Difference]: With dead ends: 667 [2022-03-15 15:53:47,001 INFO L226 Difference]: Without dead ends: 667 [2022-03-15 15:53:47,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:47,002 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:47,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 132 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 207 Unchecked, 0.1s Time] [2022-03-15 15:53:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-15 15:53:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 619. [2022-03-15 15:53:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.7880258899676376) internal successors, (1723), 618 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1723 transitions. [2022-03-15 15:53:47,008 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1723 transitions. Word has length 19 [2022-03-15 15:53:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:47,008 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1723 transitions. [2022-03-15 15:53:47,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1723 transitions. [2022-03-15 15:53:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:47,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:47,009 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:47,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:47,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-03-15 15:53:47,225 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1497808127, now seen corresponding path program 375 times [2022-03-15 15:53:47,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:47,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988933502] [2022-03-15 15:53:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:47,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988933502] [2022-03-15 15:53:47,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988933502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488351203] [2022-03-15 15:53:47,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:47,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:47,328 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:47,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-03-15 15:53:47,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:53:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:47,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:47,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:47,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:53:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:47,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:47,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:47,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:47,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:47,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:47,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488351203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:47,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:47,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:47,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517037994] [2022-03-15 15:53:47,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:47,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:47,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:47,731 INFO L87 Difference]: Start difference. First operand 619 states and 1723 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:47,829 INFO L93 Difference]: Finished difference Result 667 states and 1828 transitions. [2022-03-15 15:53:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:53:47,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:47,830 INFO L225 Difference]: With dead ends: 667 [2022-03-15 15:53:47,830 INFO L226 Difference]: Without dead ends: 667 [2022-03-15 15:53:47,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:47,830 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:47,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 128 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-03-15 15:53:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-15 15:53:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 619. [2022-03-15 15:53:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.7880258899676376) internal successors, (1723), 618 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1723 transitions. [2022-03-15 15:53:47,837 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1723 transitions. Word has length 19 [2022-03-15 15:53:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:47,837 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1723 transitions. [2022-03-15 15:53:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1723 transitions. [2022-03-15 15:53:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:47,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:47,837 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:47,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-03-15 15:53:48,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2022-03-15 15:53:48,053 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 376672815, now seen corresponding path program 376 times [2022-03-15 15:53:48,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:48,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309272661] [2022-03-15 15:53:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:48,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:48,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309272661] [2022-03-15 15:53:48,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309272661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:48,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868321093] [2022-03-15 15:53:48,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:48,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:48,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:48,204 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:48,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-03-15 15:53:48,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:48,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:48,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:48,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:53:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:48,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:53:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:48,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:48,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:48,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:53:48,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:48,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:53:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:48,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868321093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:48,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:48,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:53:48,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344380076] [2022-03-15 15:53:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:48,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:53:48,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:53:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:48,526 INFO L87 Difference]: Start difference. First operand 619 states and 1723 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:48,707 INFO L93 Difference]: Finished difference Result 661 states and 1811 transitions. [2022-03-15 15:53:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:48,709 INFO L225 Difference]: With dead ends: 661 [2022-03-15 15:53:48,709 INFO L226 Difference]: Without dead ends: 655 [2022-03-15 15:53:48,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:48,709 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:48,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 134 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 262 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-03-15 15:53:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-15 15:53:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 619. [2022-03-15 15:53:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.7864077669902914) internal successors, (1722), 618 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1722 transitions. [2022-03-15 15:53:48,715 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1722 transitions. Word has length 19 [2022-03-15 15:53:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:48,715 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1722 transitions. [2022-03-15 15:53:48,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1722 transitions. [2022-03-15 15:53:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:48,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:48,717 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:48,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:48,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-03-15 15:53:48,933 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1179114411, now seen corresponding path program 377 times [2022-03-15 15:53:48,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:48,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565404212] [2022-03-15 15:53:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:49,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:49,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565404212] [2022-03-15 15:53:49,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565404212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:49,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555783194] [2022-03-15 15:53:49,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:49,011 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:49,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-03-15 15:53:49,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:53:49,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:49,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:49,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:49,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:49,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:49,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:49,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:49,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:49,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555783194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:49,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:49,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:49,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032790353] [2022-03-15 15:53:49,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:49,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:49,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:49,404 INFO L87 Difference]: Start difference. First operand 619 states and 1722 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:49,546 INFO L93 Difference]: Finished difference Result 664 states and 1821 transitions. [2022-03-15 15:53:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:49,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:49,547 INFO L225 Difference]: With dead ends: 664 [2022-03-15 15:53:49,548 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 15:53:49,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:49,548 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:49,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 107 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 408 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:53:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 15:53:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 620. [2022-03-15 15:53:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.7851373182552503) internal successors, (1724), 619 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1724 transitions. [2022-03-15 15:53:49,554 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1724 transitions. Word has length 19 [2022-03-15 15:53:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:49,554 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1724 transitions. [2022-03-15 15:53:49,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1724 transitions. [2022-03-15 15:53:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:49,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:49,555 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:49,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-03-15 15:53:49,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:49,755 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash 181002329, now seen corresponding path program 378 times [2022-03-15 15:53:49,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:49,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132671207] [2022-03-15 15:53:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:49,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:49,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:49,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132671207] [2022-03-15 15:53:49,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132671207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:49,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760710733] [2022-03-15 15:53:49,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:49,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:49,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:49,909 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:49,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-03-15 15:53:49,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:53:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:50,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:50,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:50,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:50,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:50,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:50,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:53:50,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:50,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:53:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:50,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760710733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:50,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:50,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:50,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605080868] [2022-03-15 15:53:50,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:50,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:50,284 INFO L87 Difference]: Start difference. First operand 620 states and 1724 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:50,441 INFO L93 Difference]: Finished difference Result 663 states and 1823 transitions. [2022-03-15 15:53:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:50,443 INFO L225 Difference]: With dead ends: 663 [2022-03-15 15:53:50,443 INFO L226 Difference]: Without dead ends: 663 [2022-03-15 15:53:50,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:50,444 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:50,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 281 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-15 15:53:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-15 15:53:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 618. [2022-03-15 15:53:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.787682333873582) internal successors, (1720), 617 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1720 transitions. [2022-03-15 15:53:50,451 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1720 transitions. Word has length 19 [2022-03-15 15:53:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1720 transitions. [2022-03-15 15:53:50,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1720 transitions. [2022-03-15 15:53:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:50,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:50,452 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:50,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:50,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:50,669 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1579568051, now seen corresponding path program 379 times [2022-03-15 15:53:50,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:50,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893609160] [2022-03-15 15:53:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:50,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:50,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:50,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893609160] [2022-03-15 15:53:50,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893609160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:50,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019584016] [2022-03-15 15:53:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:50,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:50,745 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:50,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-03-15 15:53:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:50,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:50,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:50,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:50,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:53:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:50,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:50,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:50,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:53:50,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:50,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:51,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019584016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:51,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:51,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:51,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867163713] [2022-03-15 15:53:51,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:51,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:51,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:51,015 INFO L87 Difference]: Start difference. First operand 618 states and 1720 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:51,193 INFO L93 Difference]: Finished difference Result 735 states and 1955 transitions. [2022-03-15 15:53:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:51,194 INFO L225 Difference]: With dead ends: 735 [2022-03-15 15:53:51,194 INFO L226 Difference]: Without dead ends: 735 [2022-03-15 15:53:51,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:51,195 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:51,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 224 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 462 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2022-03-15 15:53:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-03-15 15:53:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 628. [2022-03-15 15:53:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 2.784688995215311) internal successors, (1746), 627 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1746 transitions. [2022-03-15 15:53:51,204 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1746 transitions. Word has length 19 [2022-03-15 15:53:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:51,204 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1746 transitions. [2022-03-15 15:53:51,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1746 transitions. [2022-03-15 15:53:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:51,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:51,205 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:51,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-03-15 15:53:51,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:51,421 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash -192134777, now seen corresponding path program 380 times [2022-03-15 15:53:51,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:51,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160455264] [2022-03-15 15:53:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:51,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:51,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:51,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160455264] [2022-03-15 15:53:51,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160455264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:51,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847154045] [2022-03-15 15:53:51,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:51,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:51,548 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-03-15 15:53:51,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:51,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:51,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:51,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:51,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:53:51,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:51,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:53:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:51,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:51,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:51,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:53:51,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:51,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:51,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847154045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:51,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:51,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:51,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005964733] [2022-03-15 15:53:51,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:51,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:51,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:51,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:51,931 INFO L87 Difference]: Start difference. First operand 628 states and 1746 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:52,384 INFO L93 Difference]: Finished difference Result 738 states and 1961 transitions. [2022-03-15 15:53:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:53:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:52,385 INFO L225 Difference]: With dead ends: 738 [2022-03-15 15:53:52,385 INFO L226 Difference]: Without dead ends: 738 [2022-03-15 15:53:52,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:53:52,386 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:52,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 210 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 624 Invalid, 0 Unknown, 180 Unchecked, 0.2s Time] [2022-03-15 15:53:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-03-15 15:53:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 628. [2022-03-15 15:53:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 2.787878787878788) internal successors, (1748), 627 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1748 transitions. [2022-03-15 15:53:52,392 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1748 transitions. Word has length 19 [2022-03-15 15:53:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:52,392 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1748 transitions. [2022-03-15 15:53:52,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1748 transitions. [2022-03-15 15:53:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:52,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:52,393 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:52,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:52,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2022-03-15 15:53:52,600 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash -110739149, now seen corresponding path program 381 times [2022-03-15 15:53:52,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:52,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780429508] [2022-03-15 15:53:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:52,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:52,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780429508] [2022-03-15 15:53:52,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780429508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:52,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43015178] [2022-03-15 15:53:52,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:52,715 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:52,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-03-15 15:53:52,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:53:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:52,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:52,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:52,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:52,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:52,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:52,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:52,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:52,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:53:52,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:52,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:52,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43015178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:52,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:52,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:52,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917945510] [2022-03-15 15:53:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:52,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:52,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:52,969 INFO L87 Difference]: Start difference. First operand 628 states and 1748 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:53,432 INFO L93 Difference]: Finished difference Result 792 states and 2068 transitions. [2022-03-15 15:53:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:53:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:53,433 INFO L225 Difference]: With dead ends: 792 [2022-03-15 15:53:53,433 INFO L226 Difference]: Without dead ends: 792 [2022-03-15 15:53:53,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:53:53,433 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:53,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 203 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 669 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-15 15:53:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-15 15:53:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 627. [2022-03-15 15:53:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.7859424920127798) internal successors, (1744), 626 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1744 transitions. [2022-03-15 15:53:53,440 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1744 transitions. Word has length 19 [2022-03-15 15:53:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:53,440 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1744 transitions. [2022-03-15 15:53:53,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1744 transitions. [2022-03-15 15:53:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:53,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:53,441 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:53,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:53,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:53,657 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash -978188797, now seen corresponding path program 382 times [2022-03-15 15:53:53,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:53,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048551020] [2022-03-15 15:53:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:53,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:53,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048551020] [2022-03-15 15:53:53,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048551020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:53,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803468494] [2022-03-15 15:53:53,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:53,741 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:53,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-03-15 15:53:53,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:53,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:53,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:53,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:53,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:53,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:53,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:53,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:53,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:53:53,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:53,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:53:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:54,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803468494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:54,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:54,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:53:54,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980166219] [2022-03-15 15:53:54,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:53:54,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:53:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:54,006 INFO L87 Difference]: Start difference. First operand 627 states and 1744 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:54,415 INFO L93 Difference]: Finished difference Result 722 states and 1926 transitions. [2022-03-15 15:53:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:53:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:54,416 INFO L225 Difference]: With dead ends: 722 [2022-03-15 15:53:54,416 INFO L226 Difference]: Without dead ends: 716 [2022-03-15 15:53:54,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:54,417 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:54,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 223 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 671 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-03-15 15:53:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-15 15:53:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 629. [2022-03-15 15:53:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.786624203821656) internal successors, (1750), 628 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1750 transitions. [2022-03-15 15:53:54,423 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1750 transitions. Word has length 19 [2022-03-15 15:53:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:54,423 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1750 transitions. [2022-03-15 15:53:54,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1750 transitions. [2022-03-15 15:53:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:54,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:54,424 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:54,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:54,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:54,635 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1249377591, now seen corresponding path program 383 times [2022-03-15 15:53:54,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:54,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873107726] [2022-03-15 15:53:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:54,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:54,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873107726] [2022-03-15 15:53:54,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873107726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:54,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417335447] [2022-03-15 15:53:54,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:54,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:54,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:54,755 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:54,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-03-15 15:53:54,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:54,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:54,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:54,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:55,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:55,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:53:55,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:55,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:53:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:55,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417335447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:55,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:55,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:55,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844579798] [2022-03-15 15:53:55,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:55,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:55,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:55,114 INFO L87 Difference]: Start difference. First operand 629 states and 1750 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:55,421 INFO L93 Difference]: Finished difference Result 704 states and 1897 transitions. [2022-03-15 15:53:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:55,422 INFO L225 Difference]: With dead ends: 704 [2022-03-15 15:53:55,422 INFO L226 Difference]: Without dead ends: 704 [2022-03-15 15:53:55,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:53:55,422 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:55,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 233 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 658 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-03-15 15:53:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-15 15:53:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 627. [2022-03-15 15:53:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.7827476038338657) internal successors, (1742), 626 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1742 transitions. [2022-03-15 15:53:55,429 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1742 transitions. Word has length 19 [2022-03-15 15:53:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:55,429 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1742 transitions. [2022-03-15 15:53:55,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1742 transitions. [2022-03-15 15:53:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:55,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:55,430 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:55,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:55,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-03-15 15:53:55,646 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash 854455175, now seen corresponding path program 384 times [2022-03-15 15:53:55,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:55,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814230057] [2022-03-15 15:53:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:55,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:55,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814230057] [2022-03-15 15:53:55,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814230057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:55,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786090361] [2022-03-15 15:53:55,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:55,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:55,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:55,708 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:55,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-03-15 15:53:55,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:53:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:55,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:55,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:55,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:55,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:53:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:55,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:55,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:55,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:55,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:55,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:55,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786090361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:55,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:55,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:53:55,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447707566] [2022-03-15 15:53:55,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:55,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:53:55,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:53:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:55,944 INFO L87 Difference]: Start difference. First operand 627 states and 1742 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:56,309 INFO L93 Difference]: Finished difference Result 743 states and 1969 transitions. [2022-03-15 15:53:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:53:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:56,310 INFO L225 Difference]: With dead ends: 743 [2022-03-15 15:53:56,310 INFO L226 Difference]: Without dead ends: 739 [2022-03-15 15:53:56,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:53:56,310 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:56,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 186 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 660 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-03-15 15:53:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-15 15:53:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 627. [2022-03-15 15:53:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.779552715654952) internal successors, (1740), 626 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1740 transitions. [2022-03-15 15:53:56,317 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1740 transitions. Word has length 19 [2022-03-15 15:53:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:56,317 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1740 transitions. [2022-03-15 15:53:56,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1740 transitions. [2022-03-15 15:53:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:56,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:56,317 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:56,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-03-15 15:53:56,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-03-15 15:53:56,520 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1077933057, now seen corresponding path program 385 times [2022-03-15 15:53:56,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:56,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206674316] [2022-03-15 15:53:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:56,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:56,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:56,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206674316] [2022-03-15 15:53:56,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206674316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:56,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596980823] [2022-03-15 15:53:56,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:56,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:56,615 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:56,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-03-15 15:53:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:56,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:56,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:56,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:56,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:53:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:56,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:56,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:56,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:56,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:56,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:56,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596980823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:56,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:56,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:56,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421671725] [2022-03-15 15:53:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:56,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:56,846 INFO L87 Difference]: Start difference. First operand 627 states and 1740 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:57,176 INFO L93 Difference]: Finished difference Result 863 states and 2221 transitions. [2022-03-15 15:53:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:53:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:57,177 INFO L225 Difference]: With dead ends: 863 [2022-03-15 15:53:57,177 INFO L226 Difference]: Without dead ends: 863 [2022-03-15 15:53:57,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:53:57,177 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:57,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 229 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 664 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-03-15 15:53:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-03-15 15:53:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 636. [2022-03-15 15:53:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.7811023622047246) internal successors, (1766), 635 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1766 transitions. [2022-03-15 15:53:57,185 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1766 transitions. Word has length 19 [2022-03-15 15:53:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:57,185 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1766 transitions. [2022-03-15 15:53:57,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1766 transitions. [2022-03-15 15:53:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:57,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:57,186 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:57,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-03-15 15:53:57,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:57,401 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash -996537429, now seen corresponding path program 386 times [2022-03-15 15:53:57,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:57,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548662559] [2022-03-15 15:53:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:57,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:57,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:57,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548662559] [2022-03-15 15:53:57,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548662559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:57,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716124766] [2022-03-15 15:53:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:57,467 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-03-15 15:53:57,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:57,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:53:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:57,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:53:57,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:57,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:53:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:57,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:57,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:57,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:57,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:57,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:53:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:57,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716124766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:57,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:57,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:57,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919080053] [2022-03-15 15:53:57,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:57,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:57,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:57,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:57,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:57,708 INFO L87 Difference]: Start difference. First operand 636 states and 1766 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:58,334 INFO L93 Difference]: Finished difference Result 913 states and 2299 transitions. [2022-03-15 15:53:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:53:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:58,336 INFO L225 Difference]: With dead ends: 913 [2022-03-15 15:53:58,336 INFO L226 Difference]: Without dead ends: 913 [2022-03-15 15:53:58,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1967, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:53:58,336 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 98 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:58,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 263 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 991 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-03-15 15:53:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-03-15 15:53:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 636. [2022-03-15 15:53:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.7811023622047246) internal successors, (1766), 635 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1766 transitions. [2022-03-15 15:53:58,343 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1766 transitions. Word has length 19 [2022-03-15 15:53:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:58,343 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1766 transitions. [2022-03-15 15:53:58,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1766 transitions. [2022-03-15 15:53:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:58,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:58,344 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:58,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:58,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:58,560 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1566672419, now seen corresponding path program 387 times [2022-03-15 15:53:58,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:58,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812381384] [2022-03-15 15:53:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:58,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:58,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812381384] [2022-03-15 15:53:58,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812381384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:58,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950565454] [2022-03-15 15:53:58,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:58,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:58,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:58,634 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:58,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-03-15 15:53:58,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:53:58,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:58,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:58,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:58,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:58,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:58,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:58,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:58,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:53:58,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:58,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:53:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:58,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950565454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:58,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:58,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:53:58,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407018205] [2022-03-15 15:53:58,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:58,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:53:58,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:53:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:58,856 INFO L87 Difference]: Start difference. First operand 636 states and 1766 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:59,154 INFO L93 Difference]: Finished difference Result 799 states and 2068 transitions. [2022-03-15 15:53:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:53:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:53:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:59,156 INFO L225 Difference]: With dead ends: 799 [2022-03-15 15:53:59,156 INFO L226 Difference]: Without dead ends: 799 [2022-03-15 15:53:59,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:53:59,156 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:59,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 203 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-15 15:53:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 643. [2022-03-15 15:53:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7866043613707165) internal successors, (1789), 642 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1789 transitions. [2022-03-15 15:53:59,163 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1789 transitions. Word has length 19 [2022-03-15 15:53:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:59,163 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1789 transitions. [2022-03-15 15:53:59,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1789 transitions. [2022-03-15 15:53:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:53:59,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:59,164 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:59,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:59,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:59,377 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash -206555679, now seen corresponding path program 388 times [2022-03-15 15:53:59,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:59,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258077627] [2022-03-15 15:53:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:59,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:59,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258077627] [2022-03-15 15:53:59,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258077627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:59,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740812588] [2022-03-15 15:53:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:59,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:59,461 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:59,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-03-15 15:53:59,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:59,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:53:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:59,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:59,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:53:59,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:59,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:53:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:59,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:59,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:53:59,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:59,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:53:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740812588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:59,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:59,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:53:59,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036184352] [2022-03-15 15:53:59,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:59,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:53:59,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:53:59,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:53:59,740 INFO L87 Difference]: Start difference. First operand 643 states and 1789 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:00,229 INFO L93 Difference]: Finished difference Result 820 states and 2144 transitions. [2022-03-15 15:54:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:54:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:00,231 INFO L225 Difference]: With dead ends: 820 [2022-03-15 15:54:00,231 INFO L226 Difference]: Without dead ends: 820 [2022-03-15 15:54:00,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:54:00,231 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 237 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:54:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-03-15 15:54:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 651. [2022-03-15 15:54:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.8015384615384615) internal successors, (1821), 650 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1821 transitions. [2022-03-15 15:54:00,238 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1821 transitions. Word has length 19 [2022-03-15 15:54:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:00,238 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1821 transitions. [2022-03-15 15:54:00,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1821 transitions. [2022-03-15 15:54:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:00,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:00,239 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:00,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-03-15 15:54:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:00,454 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1942240857, now seen corresponding path program 389 times [2022-03-15 15:54:00,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:00,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248472535] [2022-03-15 15:54:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:00,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248472535] [2022-03-15 15:54:00,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248472535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:00,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823223117] [2022-03-15 15:54:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:00,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:00,542 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:00,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-03-15 15:54:00,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:54:00,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:00,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:00,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:00,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:00,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:00,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:00,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:00,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:00,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823223117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:00,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:00,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:00,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467666894] [2022-03-15 15:54:00,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:00,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:00,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:00,815 INFO L87 Difference]: Start difference. First operand 651 states and 1821 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:01,170 INFO L93 Difference]: Finished difference Result 783 states and 2066 transitions. [2022-03-15 15:54:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:54:01,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:01,172 INFO L225 Difference]: With dead ends: 783 [2022-03-15 15:54:01,172 INFO L226 Difference]: Without dead ends: 783 [2022-03-15 15:54:01,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:01,172 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:01,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 234 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-15 15:54:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 647. [2022-03-15 15:54:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.7972136222910216) internal successors, (1807), 646 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1807 transitions. [2022-03-15 15:54:01,179 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1807 transitions. Word has length 19 [2022-03-15 15:54:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:01,179 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1807 transitions. [2022-03-15 15:54:01,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1807 transitions. [2022-03-15 15:54:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:01,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:01,180 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:01,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:01,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:01,395 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1621610269, now seen corresponding path program 390 times [2022-03-15 15:54:01,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:01,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378318536] [2022-03-15 15:54:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:01,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:01,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378318536] [2022-03-15 15:54:01,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378318536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:01,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244721114] [2022-03-15 15:54:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:01,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:01,482 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:01,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-03-15 15:54:01,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:54:01,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:01,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:54:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:01,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:54:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:01,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:01,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:54:01,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:01,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:54:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244721114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:01,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:01,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-15 15:54:01,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143146574] [2022-03-15 15:54:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:01,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:54:01,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:54:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:54:01,745 INFO L87 Difference]: Start difference. First operand 647 states and 1807 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:02,131 INFO L93 Difference]: Finished difference Result 745 states and 1982 transitions. [2022-03-15 15:54:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:02,133 INFO L225 Difference]: With dead ends: 745 [2022-03-15 15:54:02,133 INFO L226 Difference]: Without dead ends: 741 [2022-03-15 15:54:02,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:02,133 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:02,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 239 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:54:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-15 15:54:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 651. [2022-03-15 15:54:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.790769230769231) internal successors, (1814), 650 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1814 transitions. [2022-03-15 15:54:02,140 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1814 transitions. Word has length 19 [2022-03-15 15:54:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:02,140 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1814 transitions. [2022-03-15 15:54:02,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1814 transitions. [2022-03-15 15:54:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:02,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:02,141 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:02,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:02,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable395 [2022-03-15 15:54:02,355 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash -192879515, now seen corresponding path program 391 times [2022-03-15 15:54:02,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:02,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679023546] [2022-03-15 15:54:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:02,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:02,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679023546] [2022-03-15 15:54:02,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679023546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:02,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399343522] [2022-03-15 15:54:02,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:02,454 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:02,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-03-15 15:54:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:02,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:02,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:02,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:02,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:02,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:02,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:02,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:02,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:02,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:02,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399343522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:02,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:02,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:02,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499727853] [2022-03-15 15:54:02,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:02,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:02,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:02,855 INFO L87 Difference]: Start difference. First operand 651 states and 1814 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:03,020 INFO L93 Difference]: Finished difference Result 701 states and 1913 transitions. [2022-03-15 15:54:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:03,021 INFO L225 Difference]: With dead ends: 701 [2022-03-15 15:54:03,021 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 15:54:03,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:03,021 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:03,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 132 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-03-15 15:54:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 15:54:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 651. [2022-03-15 15:54:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.790769230769231) internal successors, (1814), 650 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1814 transitions. [2022-03-15 15:54:03,028 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1814 transitions. Word has length 19 [2022-03-15 15:54:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:03,028 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1814 transitions. [2022-03-15 15:54:03,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1814 transitions. [2022-03-15 15:54:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:03,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:03,029 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:03,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:03,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:03,229 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash 718907665, now seen corresponding path program 392 times [2022-03-15 15:54:03,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:03,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104242721] [2022-03-15 15:54:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:03,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104242721] [2022-03-15 15:54:03,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104242721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:03,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702589376] [2022-03-15 15:54:03,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:03,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:03,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:03,334 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:03,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-03-15 15:54:03,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:03,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:03,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:03,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:03,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:03,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:03,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:03,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:03,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:03,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702589376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:03,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:03,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:03,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987324354] [2022-03-15 15:54:03,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:03,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:03,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:03,750 INFO L87 Difference]: Start difference. First operand 651 states and 1814 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:03,944 INFO L93 Difference]: Finished difference Result 710 states and 1932 transitions. [2022-03-15 15:54:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:03,945 INFO L225 Difference]: With dead ends: 710 [2022-03-15 15:54:03,945 INFO L226 Difference]: Without dead ends: 710 [2022-03-15 15:54:03,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:03,945 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:03,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 169 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 515 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2022-03-15 15:54:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-03-15 15:54:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 651. [2022-03-15 15:54:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.790769230769231) internal successors, (1814), 650 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1814 transitions. [2022-03-15 15:54:03,952 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1814 transitions. Word has length 19 [2022-03-15 15:54:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:03,952 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1814 transitions. [2022-03-15 15:54:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1814 transitions. [2022-03-15 15:54:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:03,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:03,953 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:03,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:04,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-03-15 15:54:04,153 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash 323451361, now seen corresponding path program 393 times [2022-03-15 15:54:04,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:04,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745756743] [2022-03-15 15:54:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:04,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745756743] [2022-03-15 15:54:04,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745756743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:04,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923693820] [2022-03-15 15:54:04,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:04,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:04,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:04,295 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:04,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-03-15 15:54:04,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:04,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:04,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:04,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:04,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:04,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:04,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:04,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:04,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:04,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:04,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:04,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923693820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:04,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:04,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:04,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303070835] [2022-03-15 15:54:04,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:04,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:04,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:04,726 INFO L87 Difference]: Start difference. First operand 651 states and 1814 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:05,070 INFO L93 Difference]: Finished difference Result 685 states and 1870 transitions. [2022-03-15 15:54:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:54:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:05,071 INFO L225 Difference]: With dead ends: 685 [2022-03-15 15:54:05,071 INFO L226 Difference]: Without dead ends: 672 [2022-03-15 15:54:05,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:05,072 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:05,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 147 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 391 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-03-15 15:54:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-03-15 15:54:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 650. [2022-03-15 15:54:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.788906009244992) internal successors, (1810), 649 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1810 transitions. [2022-03-15 15:54:05,078 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1810 transitions. Word has length 19 [2022-03-15 15:54:05,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:05,078 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1810 transitions. [2022-03-15 15:54:05,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1810 transitions. [2022-03-15 15:54:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:05,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:05,079 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:05,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:05,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-03-15 15:54:05,295 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1052795163, now seen corresponding path program 394 times [2022-03-15 15:54:05,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:05,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546856015] [2022-03-15 15:54:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:05,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546856015] [2022-03-15 15:54:05,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546856015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:05,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875244206] [2022-03-15 15:54:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:05,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:05,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:05,401 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:05,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-03-15 15:54:05,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:05,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:05,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:05,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:05,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:05,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:05,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:05,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:05,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:05,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875244206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:05,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:05,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:05,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392121350] [2022-03-15 15:54:05,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:05,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:05,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:05,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:05,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:05,811 INFO L87 Difference]: Start difference. First operand 650 states and 1810 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:06,279 INFO L93 Difference]: Finished difference Result 742 states and 1992 transitions. [2022-03-15 15:54:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:06,281 INFO L225 Difference]: With dead ends: 742 [2022-03-15 15:54:06,281 INFO L226 Difference]: Without dead ends: 742 [2022-03-15 15:54:06,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:54:06,281 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:06,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 186 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 645 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-03-15 15:54:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-15 15:54:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 650. [2022-03-15 15:54:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.788906009244992) internal successors, (1810), 649 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1810 transitions. [2022-03-15 15:54:06,290 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1810 transitions. Word has length 19 [2022-03-15 15:54:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1810 transitions. [2022-03-15 15:54:06,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1810 transitions. [2022-03-15 15:54:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:06,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:06,292 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:06,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-03-15 15:54:06,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-03-15 15:54:06,503 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2121036821, now seen corresponding path program 395 times [2022-03-15 15:54:06,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:06,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734070456] [2022-03-15 15:54:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:06,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734070456] [2022-03-15 15:54:06,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734070456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:06,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803691877] [2022-03-15 15:54:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:06,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:06,657 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:06,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-03-15 15:54:06,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:06,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:06,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:06,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:06,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:06,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:06,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:06,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:07,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:07,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:07,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:07,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803691877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:07,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:07,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:07,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36359469] [2022-03-15 15:54:07,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:07,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:07,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:07,092 INFO L87 Difference]: Start difference. First operand 650 states and 1810 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:07,502 INFO L93 Difference]: Finished difference Result 685 states and 1872 transitions. [2022-03-15 15:54:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:07,503 INFO L225 Difference]: With dead ends: 685 [2022-03-15 15:54:07,503 INFO L226 Difference]: Without dead ends: 676 [2022-03-15 15:54:07,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:54:07,504 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:07,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 157 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 433 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-03-15 15:54:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-15 15:54:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 650. [2022-03-15 15:54:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.7873651771956856) internal successors, (1809), 649 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1809 transitions. [2022-03-15 15:54:07,510 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1809 transitions. Word has length 19 [2022-03-15 15:54:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:07,511 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1809 transitions. [2022-03-15 15:54:07,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1809 transitions. [2022-03-15 15:54:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:07,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:07,511 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:07,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:07,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:07,723 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -971399535, now seen corresponding path program 396 times [2022-03-15 15:54:07,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:07,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029876345] [2022-03-15 15:54:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:07,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029876345] [2022-03-15 15:54:07,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029876345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:07,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745760348] [2022-03-15 15:54:07,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:07,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:07,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:07,815 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:07,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-03-15 15:54:07,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:08,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:08,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:08,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:08,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:08,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:08,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:08,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745760348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:08,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:08,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:08,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907646333] [2022-03-15 15:54:08,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:08,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:08,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:08,212 INFO L87 Difference]: Start difference. First operand 650 states and 1809 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:08,676 INFO L93 Difference]: Finished difference Result 738 states and 1964 transitions. [2022-03-15 15:54:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:54:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:08,678 INFO L225 Difference]: With dead ends: 738 [2022-03-15 15:54:08,678 INFO L226 Difference]: Without dead ends: 738 [2022-03-15 15:54:08,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:54:08,678 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:08,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 209 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 497 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-03-15 15:54:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-03-15 15:54:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 651. [2022-03-15 15:54:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.789230769230769) internal successors, (1813), 650 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1813 transitions. [2022-03-15 15:54:08,685 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1813 transitions. Word has length 19 [2022-03-15 15:54:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:08,685 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1813 transitions. [2022-03-15 15:54:08,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1813 transitions. [2022-03-15 15:54:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:08,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:08,686 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:08,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-03-15 15:54:08,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-03-15 15:54:08,899 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1838849183, now seen corresponding path program 397 times [2022-03-15 15:54:08,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:08,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438530432] [2022-03-15 15:54:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:09,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438530432] [2022-03-15 15:54:09,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438530432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:09,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633980151] [2022-03-15 15:54:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:09,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:09,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:09,016 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:09,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-03-15 15:54:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:09,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:09,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:09,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:09,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:09,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:09,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:09,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:09,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633980151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:09,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:09,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:09,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031874313] [2022-03-15 15:54:09,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:09,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:09,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:09,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:09,544 INFO L87 Difference]: Start difference. First operand 651 states and 1813 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:10,189 INFO L93 Difference]: Finished difference Result 730 states and 1950 transitions. [2022-03-15 15:54:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:10,190 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:54:10,190 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:54:10,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:10,190 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:10,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 225 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 625 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-03-15 15:54:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:54:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 652. [2022-03-15 15:54:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.7895545314900154) internal successors, (1816), 651 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1816 transitions. [2022-03-15 15:54:10,198 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1816 transitions. Word has length 19 [2022-03-15 15:54:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:10,198 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1816 transitions. [2022-03-15 15:54:10,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1816 transitions. [2022-03-15 15:54:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:10,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:10,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:10,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:10,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-03-15 15:54:10,399 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash 388717205, now seen corresponding path program 398 times [2022-03-15 15:54:10,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:10,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352818772] [2022-03-15 15:54:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:10,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352818772] [2022-03-15 15:54:10,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352818772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:10,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375390807] [2022-03-15 15:54:10,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:10,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:10,551 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:10,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-03-15 15:54:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:10,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:10,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:10,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:10,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:10,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:10,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:10,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:10,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375390807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:11,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:11,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:11,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649409532] [2022-03-15 15:54:11,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:11,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:11,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:11,014 INFO L87 Difference]: Start difference. First operand 652 states and 1816 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:11,300 INFO L93 Difference]: Finished difference Result 712 states and 1923 transitions. [2022-03-15 15:54:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:54:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:11,301 INFO L225 Difference]: With dead ends: 712 [2022-03-15 15:54:11,301 INFO L226 Difference]: Without dead ends: 712 [2022-03-15 15:54:11,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:11,301 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:11,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 479 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-03-15 15:54:11,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-15 15:54:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 651. [2022-03-15 15:54:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.787692307692308) internal successors, (1812), 650 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1812 transitions. [2022-03-15 15:54:11,308 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1812 transitions. Word has length 19 [2022-03-15 15:54:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1812 transitions. [2022-03-15 15:54:11,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1812 transitions. [2022-03-15 15:54:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:11,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:11,309 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:11,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:11,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-03-15 15:54:11,519 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash -6205211, now seen corresponding path program 399 times [2022-03-15 15:54:11,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:11,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157524243] [2022-03-15 15:54:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:11,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157524243] [2022-03-15 15:54:11,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157524243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:11,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97781341] [2022-03-15 15:54:11,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:11,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:11,629 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:11,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-03-15 15:54:11,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:54:11,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:11,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:11,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:11,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:11,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:11,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:11,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:11,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97781341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:11,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:11,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:11,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103080922] [2022-03-15 15:54:11,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:11,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:11,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:11,964 INFO L87 Difference]: Start difference. First operand 651 states and 1812 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:12,365 INFO L93 Difference]: Finished difference Result 717 states and 1938 transitions. [2022-03-15 15:54:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:54:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:12,367 INFO L225 Difference]: With dead ends: 717 [2022-03-15 15:54:12,367 INFO L226 Difference]: Without dead ends: 713 [2022-03-15 15:54:12,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:12,367 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:12,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 139 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 540 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-03-15 15:54:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-15 15:54:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 648. [2022-03-15 15:54:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7897990726429676) internal successors, (1805), 647 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1805 transitions. [2022-03-15 15:54:12,374 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1805 transitions. Word has length 19 [2022-03-15 15:54:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:12,374 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1805 transitions. [2022-03-15 15:54:12,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1805 transitions. [2022-03-15 15:54:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:12,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:12,374 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:12,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-03-15 15:54:12,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-03-15 15:54:12,582 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1819657711, now seen corresponding path program 400 times [2022-03-15 15:54:12,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:12,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609706678] [2022-03-15 15:54:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609706678] [2022-03-15 15:54:12,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609706678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954359458] [2022-03-15 15:54:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:12,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:12,681 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:12,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-03-15 15:54:12,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:12,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:12,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:12,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:54:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:12,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:12,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:13,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:13,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954359458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:13,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:13,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:13,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080020760] [2022-03-15 15:54:13,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:13,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:13,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:13,059 INFO L87 Difference]: Start difference. First operand 648 states and 1805 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:13,272 INFO L93 Difference]: Finished difference Result 751 states and 2009 transitions. [2022-03-15 15:54:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:54:13,272 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:13,273 INFO L225 Difference]: With dead ends: 751 [2022-03-15 15:54:13,274 INFO L226 Difference]: Without dead ends: 751 [2022-03-15 15:54:13,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:13,274 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:13,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 161 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 523 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-03-15 15:54:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-15 15:54:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 651. [2022-03-15 15:54:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.790769230769231) internal successors, (1814), 650 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1814 transitions. [2022-03-15 15:54:13,281 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1814 transitions. Word has length 19 [2022-03-15 15:54:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:13,281 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1814 transitions. [2022-03-15 15:54:13,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1814 transitions. [2022-03-15 15:54:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:13,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:13,282 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:13,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-03-15 15:54:13,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2022-03-15 15:54:13,482 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 703606757, now seen corresponding path program 401 times [2022-03-15 15:54:13,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:13,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776433474] [2022-03-15 15:54:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:13,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:13,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776433474] [2022-03-15 15:54:13,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776433474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:13,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196651185] [2022-03-15 15:54:13,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:13,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:13,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:13,586 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:13,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-03-15 15:54:13,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:54:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:13,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:13,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:13,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:13,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:13,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:13,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:13,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:13,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:13,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196651185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:13,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:13,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:13,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489722781] [2022-03-15 15:54:13,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:13,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:13,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:13,927 INFO L87 Difference]: Start difference. First operand 651 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:14,262 INFO L93 Difference]: Finished difference Result 822 states and 2162 transitions. [2022-03-15 15:54:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:14,264 INFO L225 Difference]: With dead ends: 822 [2022-03-15 15:54:14,264 INFO L226 Difference]: Without dead ends: 822 [2022-03-15 15:54:14,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:54:14,264 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:14,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 164 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 611 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-03-15 15:54:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-03-15 15:54:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 657. [2022-03-15 15:54:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.792682926829268) internal successors, (1832), 656 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1832 transitions. [2022-03-15 15:54:14,271 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1832 transitions. Word has length 19 [2022-03-15 15:54:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:14,271 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1832 transitions. [2022-03-15 15:54:14,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1832 transitions. [2022-03-15 15:54:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:14,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:14,272 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:14,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:14,487 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1363794151, now seen corresponding path program 402 times [2022-03-15 15:54:14,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:14,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709075603] [2022-03-15 15:54:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:14,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709075603] [2022-03-15 15:54:14,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709075603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:14,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626472962] [2022-03-15 15:54:14,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:14,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:14,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:14,554 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:14,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-03-15 15:54:14,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:14,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:14,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:14,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:14,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:54:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:14,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:14,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:14,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:14,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626472962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:14,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:14,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:14,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86936646] [2022-03-15 15:54:14,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:14,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:14,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:14,886 INFO L87 Difference]: Start difference. First operand 657 states and 1832 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:15,192 INFO L93 Difference]: Finished difference Result 811 states and 2141 transitions. [2022-03-15 15:54:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:54:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:15,193 INFO L225 Difference]: With dead ends: 811 [2022-03-15 15:54:15,193 INFO L226 Difference]: Without dead ends: 811 [2022-03-15 15:54:15,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:54:15,193 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:15,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 145 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 495 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-03-15 15:54:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-03-15 15:54:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 652. [2022-03-15 15:54:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.791090629800307) internal successors, (1817), 651 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1817 transitions. [2022-03-15 15:54:15,200 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1817 transitions. Word has length 19 [2022-03-15 15:54:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:15,200 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1817 transitions. [2022-03-15 15:54:15,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1817 transitions. [2022-03-15 15:54:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:15,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:15,201 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:15,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:15,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-03-15 15:54:15,407 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash -417528555, now seen corresponding path program 403 times [2022-03-15 15:54:15,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:15,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253287342] [2022-03-15 15:54:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:15,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253287342] [2022-03-15 15:54:15,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253287342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:15,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067767593] [2022-03-15 15:54:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:15,521 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:15,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-03-15 15:54:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:15,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:15,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:15,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:15,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:15,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:15,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:15,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:54:15,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:15,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:54:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067767593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:15,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:15,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:54:15,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692170071] [2022-03-15 15:54:15,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:15,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:54:15,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:54:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:54:15,816 INFO L87 Difference]: Start difference. First operand 652 states and 1817 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:16,138 INFO L93 Difference]: Finished difference Result 682 states and 1869 transitions. [2022-03-15 15:54:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:54:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:16,139 INFO L225 Difference]: With dead ends: 682 [2022-03-15 15:54:16,139 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 15:54:16,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:16,139 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:16,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 116 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 342 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2022-03-15 15:54:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 15:54:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 652. [2022-03-15 15:54:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.7864823348694316) internal successors, (1814), 651 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1814 transitions. [2022-03-15 15:54:16,145 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1814 transitions. Word has length 19 [2022-03-15 15:54:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:16,146 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1814 transitions. [2022-03-15 15:54:16,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1814 transitions. [2022-03-15 15:54:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:16,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:16,146 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:16,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-03-15 15:54:16,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2022-03-15 15:54:16,347 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1973315781, now seen corresponding path program 404 times [2022-03-15 15:54:16,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:16,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585192006] [2022-03-15 15:54:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:16,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:16,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585192006] [2022-03-15 15:54:16,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585192006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:16,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969040618] [2022-03-15 15:54:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:16,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:16,457 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:16,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-03-15 15:54:16,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:16,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:16,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:16,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:16,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:16,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:16,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969040618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:16,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:16,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:16,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652178968] [2022-03-15 15:54:16,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:16,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:16,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:16,849 INFO L87 Difference]: Start difference. First operand 652 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:17,538 INFO L93 Difference]: Finished difference Result 900 states and 2305 transitions. [2022-03-15 15:54:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:54:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:17,540 INFO L225 Difference]: With dead ends: 900 [2022-03-15 15:54:17,540 INFO L226 Difference]: Without dead ends: 900 [2022-03-15 15:54:17,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:54:17,540 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:17,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 189 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 593 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-03-15 15:54:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-03-15 15:54:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 650. [2022-03-15 15:54:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.782742681047766) internal successors, (1806), 649 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1806 transitions. [2022-03-15 15:54:17,547 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1806 transitions. Word has length 19 [2022-03-15 15:54:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:17,547 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1806 transitions. [2022-03-15 15:54:17,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1806 transitions. [2022-03-15 15:54:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:17,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:17,548 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:17,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-03-15 15:54:17,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,749 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash -613199041, now seen corresponding path program 405 times [2022-03-15 15:54:17,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:17,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653527174] [2022-03-15 15:54:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:17,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653527174] [2022-03-15 15:54:17,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653527174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:17,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924605504] [2022-03-15 15:54:17,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:17,890 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:17,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-03-15 15:54:17,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:54:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:18,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:18,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:18,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:18,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:18,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:18,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:18,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924605504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:18,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:18,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:18,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782259569] [2022-03-15 15:54:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:18,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:18,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:18,286 INFO L87 Difference]: Start difference. First operand 650 states and 1806 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:18,777 INFO L93 Difference]: Finished difference Result 727 states and 1942 transitions. [2022-03-15 15:54:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:18,778 INFO L225 Difference]: With dead ends: 727 [2022-03-15 15:54:18,778 INFO L226 Difference]: Without dead ends: 727 [2022-03-15 15:54:18,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:18,778 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:18,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 243 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 638 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-03-15 15:54:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-03-15 15:54:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 646. [2022-03-15 15:54:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7829457364341086) internal successors, (1795), 645 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1795 transitions. [2022-03-15 15:54:18,785 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1795 transitions. Word has length 19 [2022-03-15 15:54:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:18,785 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1795 transitions. [2022-03-15 15:54:18,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1795 transitions. [2022-03-15 15:54:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:18,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:18,786 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:18,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-03-15 15:54:18,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-03-15 15:54:18,992 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1872134427, now seen corresponding path program 406 times [2022-03-15 15:54:18,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:18,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671931429] [2022-03-15 15:54:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:18,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:19,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671931429] [2022-03-15 15:54:19,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671931429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:19,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572284589] [2022-03-15 15:54:19,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:19,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:19,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:19,109 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:19,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-03-15 15:54:19,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:19,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:19,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:19,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:19,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:19,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:19,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:19,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:19,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:19,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:54:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572284589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:19,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:19,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:19,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036816634] [2022-03-15 15:54:19,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:19,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:19,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:19,457 INFO L87 Difference]: Start difference. First operand 646 states and 1795 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:19,757 INFO L93 Difference]: Finished difference Result 794 states and 2095 transitions. [2022-03-15 15:54:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:19,759 INFO L225 Difference]: With dead ends: 794 [2022-03-15 15:54:19,759 INFO L226 Difference]: Without dead ends: 794 [2022-03-15 15:54:19,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:19,759 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:19,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 250 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 568 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2022-03-15 15:54:19,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-15 15:54:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 655. [2022-03-15 15:54:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.790519877675841) internal successors, (1825), 654 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1825 transitions. [2022-03-15 15:54:19,766 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1825 transitions. Word has length 19 [2022-03-15 15:54:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:19,766 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1825 transitions. [2022-03-15 15:54:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1825 transitions. [2022-03-15 15:54:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:19,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:19,767 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:19,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:19,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-03-15 15:54:19,968 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1106027071, now seen corresponding path program 407 times [2022-03-15 15:54:19,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:19,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715909402] [2022-03-15 15:54:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:20,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715909402] [2022-03-15 15:54:20,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715909402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:20,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905677494] [2022-03-15 15:54:20,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:20,086 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:20,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-03-15 15:54:20,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:54:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:20,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:20,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:20,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:20,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:20,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:54:20,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:20,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:54:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905677494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:20,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:20,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:20,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495906191] [2022-03-15 15:54:20,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:20,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:20,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:20,420 INFO L87 Difference]: Start difference. First operand 655 states and 1825 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:20,876 INFO L93 Difference]: Finished difference Result 778 states and 2041 transitions. [2022-03-15 15:54:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:54:20,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:20,877 INFO L225 Difference]: With dead ends: 778 [2022-03-15 15:54:20,877 INFO L226 Difference]: Without dead ends: 778 [2022-03-15 15:54:20,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:54:20,878 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:20,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 296 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 712 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-03-15 15:54:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-03-15 15:54:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 654. [2022-03-15 15:54:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.788667687595712) internal successors, (1821), 653 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1821 transitions. [2022-03-15 15:54:20,885 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1821 transitions. Word has length 19 [2022-03-15 15:54:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:20,885 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1821 transitions. [2022-03-15 15:54:20,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1821 transitions. [2022-03-15 15:54:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:20,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:20,885 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:20,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-03-15 15:54:21,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2022-03-15 15:54:21,087 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1000757049, now seen corresponding path program 408 times [2022-03-15 15:54:21,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:21,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507955576] [2022-03-15 15:54:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:21,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:21,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:21,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507955576] [2022-03-15 15:54:21,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507955576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:21,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254553598] [2022-03-15 15:54:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:21,196 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:21,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-03-15 15:54:21,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:54:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:21,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:21,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:21,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:21,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:21,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:21,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:21,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:21,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:21,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:21,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254553598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:21,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:21,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:21,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733162032] [2022-03-15 15:54:21,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:21,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:21,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:21,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:21,521 INFO L87 Difference]: Start difference. First operand 654 states and 1821 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:22,050 INFO L93 Difference]: Finished difference Result 832 states and 2173 transitions. [2022-03-15 15:54:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:54:22,050 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:22,051 INFO L225 Difference]: With dead ends: 832 [2022-03-15 15:54:22,051 INFO L226 Difference]: Without dead ends: 832 [2022-03-15 15:54:22,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:54:22,052 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:22,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 198 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-15 15:54:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 659. [2022-03-15 15:54:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.791793313069909) internal successors, (1837), 658 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1837 transitions. [2022-03-15 15:54:22,059 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1837 transitions. Word has length 19 [2022-03-15 15:54:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:22,059 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1837 transitions. [2022-03-15 15:54:22,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1837 transitions. [2022-03-15 15:54:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:22,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:22,060 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:22,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:22,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-03-15 15:54:22,277 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1148039487, now seen corresponding path program 409 times [2022-03-15 15:54:22,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:22,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048070834] [2022-03-15 15:54:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:22,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:22,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:22,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048070834] [2022-03-15 15:54:22,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048070834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:22,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964704638] [2022-03-15 15:54:22,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:22,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:22,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:22,344 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:22,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-03-15 15:54:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:22,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:22,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:22,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:22,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:54:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:22,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:22,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:22,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:22,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:22,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:22,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964704638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:22,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:22,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:22,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179767575] [2022-03-15 15:54:22,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:22,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:22,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:22,568 INFO L87 Difference]: Start difference. First operand 659 states and 1837 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:22,846 INFO L93 Difference]: Finished difference Result 780 states and 2061 transitions. [2022-03-15 15:54:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:54:22,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:22,847 INFO L225 Difference]: With dead ends: 780 [2022-03-15 15:54:22,847 INFO L226 Difference]: Without dead ends: 780 [2022-03-15 15:54:22,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:22,847 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:22,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 223 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-15 15:54:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 653. [2022-03-15 15:54:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.785276073619632) internal successors, (1816), 652 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1816 transitions. [2022-03-15 15:54:22,854 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1816 transitions. Word has length 19 [2022-03-15 15:54:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:22,854 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1816 transitions. [2022-03-15 15:54:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1816 transitions. [2022-03-15 15:54:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:22,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:22,855 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:22,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:23,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-03-15 15:54:23,071 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash 827408899, now seen corresponding path program 410 times [2022-03-15 15:54:23,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:23,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88110854] [2022-03-15 15:54:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:23,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:23,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88110854] [2022-03-15 15:54:23,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88110854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:23,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879380100] [2022-03-15 15:54:23,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:23,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:23,143 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:23,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-03-15 15:54:23,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:23,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:23,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:23,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:54:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:23,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:54:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:23,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:23,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:23,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:54:23,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:23,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:54:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:23,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879380100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:23,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:23,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:54:23,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373312277] [2022-03-15 15:54:23,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:23,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:54:23,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:54:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:54:23,366 INFO L87 Difference]: Start difference. First operand 653 states and 1816 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:23,668 INFO L93 Difference]: Finished difference Result 707 states and 1903 transitions. [2022-03-15 15:54:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:23,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:23,669 INFO L225 Difference]: With dead ends: 707 [2022-03-15 15:54:23,669 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 15:54:23,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:23,670 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:23,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 156 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 15:54:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 653. [2022-03-15 15:54:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7791411042944785) internal successors, (1812), 652 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1812 transitions. [2022-03-15 15:54:23,676 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1812 transitions. Word has length 19 [2022-03-15 15:54:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:23,676 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1812 transitions. [2022-03-15 15:54:23,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1812 transitions. [2022-03-15 15:54:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:23,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:23,677 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:23,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:23,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:23,887 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:23,887 INFO L85 PathProgramCache]: Analyzing trace with hash -488353903, now seen corresponding path program 411 times [2022-03-15 15:54:23,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:23,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582518371] [2022-03-15 15:54:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:24,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582518371] [2022-03-15 15:54:24,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582518371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:24,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941674821] [2022-03-15 15:54:24,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:24,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:24,004 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:24,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-03-15 15:54:24,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:24,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:24,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:24,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:24,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:24,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:24,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:24,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941674821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:24,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:24,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:24,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408436484] [2022-03-15 15:54:24,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:24,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:24,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:24,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:24,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:24,298 INFO L87 Difference]: Start difference. First operand 653 states and 1812 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:24,641 INFO L93 Difference]: Finished difference Result 767 states and 2007 transitions. [2022-03-15 15:54:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:54:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:24,642 INFO L225 Difference]: With dead ends: 767 [2022-03-15 15:54:24,642 INFO L226 Difference]: Without dead ends: 767 [2022-03-15 15:54:24,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:24,643 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:24,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 190 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-15 15:54:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 644. [2022-03-15 15:54:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.774494556765163) internal successors, (1784), 643 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1784 transitions. [2022-03-15 15:54:24,650 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1784 transitions. Word has length 19 [2022-03-15 15:54:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:24,650 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1784 transitions. [2022-03-15 15:54:24,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1784 transitions. [2022-03-15 15:54:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:24,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:24,651 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:24,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:24,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:24,866 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1355803551, now seen corresponding path program 412 times [2022-03-15 15:54:24,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:24,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794817633] [2022-03-15 15:54:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:24,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:24,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794817633] [2022-03-15 15:54:24,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794817633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:24,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454107087] [2022-03-15 15:54:24,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:24,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:24,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:24,939 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:24,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-03-15 15:54:24,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:24,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:25,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:25,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:25,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:25,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:25,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:25,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:25,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:25,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:25,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454107087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:25,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:25,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:25,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483841832] [2022-03-15 15:54:25,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:25,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:25,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:25,180 INFO L87 Difference]: Start difference. First operand 644 states and 1784 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:25,743 INFO L93 Difference]: Finished difference Result 771 states and 2027 transitions. [2022-03-15 15:54:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:54:25,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:25,744 INFO L225 Difference]: With dead ends: 771 [2022-03-15 15:54:25,744 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 15:54:25,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:54:25,744 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:25,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 161 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 15:54:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 657. [2022-03-15 15:54:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7804878048780486) internal successors, (1824), 656 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1824 transitions. [2022-03-15 15:54:25,752 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1824 transitions. Word has length 19 [2022-03-15 15:54:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:25,752 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1824 transitions. [2022-03-15 15:54:25,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1824 transitions. [2022-03-15 15:54:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:25,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:25,753 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:25,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2022-03-15 15:54:25,970 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash 871762837, now seen corresponding path program 413 times [2022-03-15 15:54:25,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:25,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737545095] [2022-03-15 15:54:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:26,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:26,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737545095] [2022-03-15 15:54:26,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737545095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:26,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532340680] [2022-03-15 15:54:26,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:26,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:26,039 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:26,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-03-15 15:54:26,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:54:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:26,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:26,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:26,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:26,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:26,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:26,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:26,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:26,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:26,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532340680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:26,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:26,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:26,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738751824] [2022-03-15 15:54:26,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:26,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:26,277 INFO L87 Difference]: Start difference. First operand 657 states and 1824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:26,856 INFO L93 Difference]: Finished difference Result 791 states and 2074 transitions. [2022-03-15 15:54:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:54:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:26,858 INFO L225 Difference]: With dead ends: 791 [2022-03-15 15:54:26,858 INFO L226 Difference]: Without dead ends: 791 [2022-03-15 15:54:26,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1939, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:54:26,858 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:26,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 148 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-15 15:54:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 654. [2022-03-15 15:54:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.777947932618683) internal successors, (1814), 653 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1814 transitions. [2022-03-15 15:54:26,873 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1814 transitions. Word has length 19 [2022-03-15 15:54:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:26,873 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1814 transitions. [2022-03-15 15:54:26,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1814 transitions. [2022-03-15 15:54:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:26,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:26,873 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:26,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:27,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-03-15 15:54:27,089 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1274407923, now seen corresponding path program 414 times [2022-03-15 15:54:27,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:27,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913568199] [2022-03-15 15:54:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:27,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:27,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:27,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913568199] [2022-03-15 15:54:27,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913568199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:27,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92811054] [2022-03-15 15:54:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:27,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:27,161 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:27,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-03-15 15:54:27,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:27,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:27,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:27,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:27,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:54:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:27,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:27,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:27,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:27,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:27,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92811054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:27,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:27,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:27,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637902375] [2022-03-15 15:54:27,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:27,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:27,391 INFO L87 Difference]: Start difference. First operand 654 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:27,771 INFO L93 Difference]: Finished difference Result 747 states and 1998 transitions. [2022-03-15 15:54:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:27,772 INFO L225 Difference]: With dead ends: 747 [2022-03-15 15:54:27,772 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 15:54:27,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:54:27,772 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:27,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 120 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 15:54:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 650. [2022-03-15 15:54:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.773497688751926) internal successors, (1800), 649 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1800 transitions. [2022-03-15 15:54:27,779 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1800 transitions. Word has length 19 [2022-03-15 15:54:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:27,779 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1800 transitions. [2022-03-15 15:54:27,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1800 transitions. [2022-03-15 15:54:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:27,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:27,780 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:27,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:27,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:27,996 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -58389381, now seen corresponding path program 415 times [2022-03-15 15:54:27,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:27,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281175840] [2022-03-15 15:54:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:28,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:28,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281175840] [2022-03-15 15:54:28,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281175840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:28,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236729679] [2022-03-15 15:54:28,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:28,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:28,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:28,076 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:28,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-03-15 15:54:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:28,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:28,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:54:28,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:28,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:54:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:28,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:28,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:28,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:54:28,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:28,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:54:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:28,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236729679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:28,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:28,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:54:28,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056569645] [2022-03-15 15:54:28,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:28,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:28,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:28,326 INFO L87 Difference]: Start difference. First operand 650 states and 1800 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:28,666 INFO L93 Difference]: Finished difference Result 680 states and 1852 transitions. [2022-03-15 15:54:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:54:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:28,667 INFO L225 Difference]: With dead ends: 680 [2022-03-15 15:54:28,667 INFO L226 Difference]: Without dead ends: 674 [2022-03-15 15:54:28,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:28,667 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:28,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 104 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-03-15 15:54:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 649. [2022-03-15 15:54:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.7700617283950617) internal successors, (1795), 648 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1795 transitions. [2022-03-15 15:54:28,674 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1795 transitions. Word has length 19 [2022-03-15 15:54:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:28,674 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1795 transitions. [2022-03-15 15:54:28,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1795 transitions. [2022-03-15 15:54:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:28,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:28,674 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:28,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-03-15 15:54:28,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-03-15 15:54:28,891 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash 913775253, now seen corresponding path program 416 times [2022-03-15 15:54:28,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:28,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091634918] [2022-03-15 15:54:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:28,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:28,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:28,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091634918] [2022-03-15 15:54:28,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091634918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:28,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554837064] [2022-03-15 15:54:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:28,959 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:28,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-03-15 15:54:28,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:29,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:29,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:29,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:29,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:29,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:29,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:29,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:29,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:29,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554837064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:29,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:29,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:29,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485548520] [2022-03-15 15:54:29,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:29,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:29,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:29,201 INFO L87 Difference]: Start difference. First operand 649 states and 1795 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:29,436 INFO L93 Difference]: Finished difference Result 711 states and 1910 transitions. [2022-03-15 15:54:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:29,437 INFO L225 Difference]: With dead ends: 711 [2022-03-15 15:54:29,437 INFO L226 Difference]: Without dead ends: 711 [2022-03-15 15:54:29,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:54:29,437 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:29,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-15 15:54:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 643. [2022-03-15 15:54:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.764797507788162) internal successors, (1775), 642 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1775 transitions. [2022-03-15 15:54:29,443 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1775 transitions. Word has length 19 [2022-03-15 15:54:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:29,443 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1775 transitions. [2022-03-15 15:54:29,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1775 transitions. [2022-03-15 15:54:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:29,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:29,444 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:29,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:29,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-03-15 15:54:29,660 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:29,660 INFO L85 PathProgramCache]: Analyzing trace with hash 529355941, now seen corresponding path program 417 times [2022-03-15 15:54:29,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:29,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822146533] [2022-03-15 15:54:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:29,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:29,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822146533] [2022-03-15 15:54:29,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822146533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:29,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474598093] [2022-03-15 15:54:29,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:29,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:29,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:29,728 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:29,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-03-15 15:54:29,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:54:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:29,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:29,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:29,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:54:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:29,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:54:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:29,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:29,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:29,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:54:29,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:29,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:54:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:29,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474598093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:29,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:29,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:54:29,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23472585] [2022-03-15 15:54:29,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:29,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:54:29,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:54:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:54:29,953 INFO L87 Difference]: Start difference. First operand 643 states and 1775 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:30,143 INFO L93 Difference]: Finished difference Result 670 states and 1824 transitions. [2022-03-15 15:54:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:54:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:30,144 INFO L225 Difference]: With dead ends: 670 [2022-03-15 15:54:30,144 INFO L226 Difference]: Without dead ends: 660 [2022-03-15 15:54:30,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:30,144 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:30,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-03-15 15:54:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 643. [2022-03-15 15:54:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7601246105919004) internal successors, (1772), 642 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1772 transitions. [2022-03-15 15:54:30,150 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1772 transitions. Word has length 19 [2022-03-15 15:54:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:30,150 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1772 transitions. [2022-03-15 15:54:30,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1772 transitions. [2022-03-15 15:54:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:30,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:30,151 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:30,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:30,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-03-15 15:54:30,367 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1952170177, now seen corresponding path program 418 times [2022-03-15 15:54:30,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:30,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454727515] [2022-03-15 15:54:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:30,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:30,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454727515] [2022-03-15 15:54:30,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454727515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:30,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182764396] [2022-03-15 15:54:30,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:30,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:30,447 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:30,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-03-15 15:54:30,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:30,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:30,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:30,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:30,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:30,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:30,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:30,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:30,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182764396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:30,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:30,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:30,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665562266] [2022-03-15 15:54:30,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:30,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:30,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:30,770 INFO L87 Difference]: Start difference. First operand 643 states and 1772 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:30,880 INFO L93 Difference]: Finished difference Result 721 states and 1926 transitions. [2022-03-15 15:54:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:30,881 INFO L225 Difference]: With dead ends: 721 [2022-03-15 15:54:30,881 INFO L226 Difference]: Without dead ends: 721 [2022-03-15 15:54:30,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:30,881 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:30,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 176 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 367 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-03-15 15:54:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-15 15:54:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 647. [2022-03-15 15:54:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.761609907120743) internal successors, (1784), 646 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1784 transitions. [2022-03-15 15:54:30,888 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1784 transitions. Word has length 19 [2022-03-15 15:54:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:30,888 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1784 transitions. [2022-03-15 15:54:30,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1784 transitions. [2022-03-15 15:54:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:30,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:30,889 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:30,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:31,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-03-15 15:54:31,103 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1424846929, now seen corresponding path program 419 times [2022-03-15 15:54:31,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:31,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274396404] [2022-03-15 15:54:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:31,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:31,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274396404] [2022-03-15 15:54:31,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274396404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:31,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903727318] [2022-03-15 15:54:31,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:31,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:31,207 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:31,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-03-15 15:54:31,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:31,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:31,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:31,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:54:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:31,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:31,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:31,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:31,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:31,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:31,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903727318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:31,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:31,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:31,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853159848] [2022-03-15 15:54:31,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:31,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:31,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:31,497 INFO L87 Difference]: Start difference. First operand 647 states and 1784 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:31,605 INFO L93 Difference]: Finished difference Result 719 states and 1924 transitions. [2022-03-15 15:54:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:31,606 INFO L225 Difference]: With dead ends: 719 [2022-03-15 15:54:31,606 INFO L226 Difference]: Without dead ends: 719 [2022-03-15 15:54:31,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:31,607 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:31,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 225 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 376 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-03-15 15:54:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-03-15 15:54:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 648. [2022-03-15 15:54:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7619783616692426) internal successors, (1787), 647 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1787 transitions. [2022-03-15 15:54:31,613 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1787 transitions. Word has length 19 [2022-03-15 15:54:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:31,613 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1787 transitions. [2022-03-15 15:54:31,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1787 transitions. [2022-03-15 15:54:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:31,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:31,614 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:31,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-03-15 15:54:31,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-03-15 15:54:31,819 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:31,819 INFO L85 PathProgramCache]: Analyzing trace with hash -154584717, now seen corresponding path program 420 times [2022-03-15 15:54:31,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:31,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438123498] [2022-03-15 15:54:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:31,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:31,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:31,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438123498] [2022-03-15 15:54:31,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438123498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:31,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972109363] [2022-03-15 15:54:31,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:31,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:31,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:31,919 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:31,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-03-15 15:54:31,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:54:31,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:31,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:32,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:32,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:32,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:32,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:54:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:32,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:32,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:32,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:32,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:32,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:32,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972109363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:32,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:32,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:32,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375714741] [2022-03-15 15:54:32,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:32,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:32,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:32,354 INFO L87 Difference]: Start difference. First operand 648 states and 1787 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:32,522 INFO L93 Difference]: Finished difference Result 733 states and 1963 transitions. [2022-03-15 15:54:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:32,524 INFO L225 Difference]: With dead ends: 733 [2022-03-15 15:54:32,524 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 15:54:32,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:32,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:32,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 396 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-03-15 15:54:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 15:54:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 653. [2022-03-15 15:54:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7622699386503067) internal successors, (1801), 652 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1801 transitions. [2022-03-15 15:54:32,530 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1801 transitions. Word has length 19 [2022-03-15 15:54:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:32,531 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1801 transitions. [2022-03-15 15:54:32,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1801 transitions. [2022-03-15 15:54:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:32,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:32,531 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:32,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:32,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:32,743 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1846763999, now seen corresponding path program 421 times [2022-03-15 15:54:32,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:32,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836805686] [2022-03-15 15:54:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:32,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:32,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836805686] [2022-03-15 15:54:32,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836805686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:32,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271248326] [2022-03-15 15:54:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:32,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:32,847 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-03-15 15:54:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:32,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:32,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:32,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:33,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:33,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:54:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:33,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:33,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:33,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:33,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271248326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:33,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:33,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:33,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319555876] [2022-03-15 15:54:33,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:33,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:33,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:33,143 INFO L87 Difference]: Start difference. First operand 653 states and 1801 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:33,276 INFO L93 Difference]: Finished difference Result 736 states and 1955 transitions. [2022-03-15 15:54:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:54:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:33,277 INFO L225 Difference]: With dead ends: 736 [2022-03-15 15:54:33,277 INFO L226 Difference]: Without dead ends: 736 [2022-03-15 15:54:33,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:33,277 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:33,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 176 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 471 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-03-15 15:54:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-15 15:54:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 652. [2022-03-15 15:54:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.761904761904762) internal successors, (1798), 651 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1798 transitions. [2022-03-15 15:54:33,291 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1798 transitions. Word has length 19 [2022-03-15 15:54:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:33,291 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1798 transitions. [2022-03-15 15:54:33,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1798 transitions. [2022-03-15 15:54:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:33,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:33,292 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:33,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Ended with exit code 0 [2022-03-15 15:54:33,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-03-15 15:54:33,508 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1040382997, now seen corresponding path program 422 times [2022-03-15 15:54:33,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:33,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694858587] [2022-03-15 15:54:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:33,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694858587] [2022-03-15 15:54:33,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694858587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:33,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466305882] [2022-03-15 15:54:33,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:33,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:33,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:33,594 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:33,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-03-15 15:54:33,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:33,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:33,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:33,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:33,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:54:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:33,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:33,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:33,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:33,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466305882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:33,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:33,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:33,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290828783] [2022-03-15 15:54:33,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:33,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:33,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:33,908 INFO L87 Difference]: Start difference. First operand 652 states and 1798 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:34,154 INFO L93 Difference]: Finished difference Result 761 states and 2016 transitions. [2022-03-15 15:54:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:34,155 INFO L225 Difference]: With dead ends: 761 [2022-03-15 15:54:34,155 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 15:54:34,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:34,156 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:34,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 217 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 508 Invalid, 0 Unknown, 166 Unchecked, 0.1s Time] [2022-03-15 15:54:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 15:54:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 658. [2022-03-15 15:54:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.7579908675799087) internal successors, (1812), 657 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1812 transitions. [2022-03-15 15:54:34,163 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1812 transitions. Word has length 19 [2022-03-15 15:54:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:34,163 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1812 transitions. [2022-03-15 15:54:34,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1812 transitions. [2022-03-15 15:54:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:34,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:34,164 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:34,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:34,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2022-03-15 15:54:34,379 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1562405017, now seen corresponding path program 423 times [2022-03-15 15:54:34,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:34,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994376735] [2022-03-15 15:54:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:34,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:34,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:34,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994376735] [2022-03-15 15:54:34,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994376735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:34,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291404466] [2022-03-15 15:54:34,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:34,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:34,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:34,450 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:34,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-03-15 15:54:34,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:34,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:34,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:34,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:34,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:34,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:34,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:34,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:34,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:34,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:34,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:34,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291404466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:34,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:34,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:34,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094100306] [2022-03-15 15:54:34,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:34,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:34,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:34,829 INFO L87 Difference]: Start difference. First operand 658 states and 1812 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:35,083 INFO L93 Difference]: Finished difference Result 773 states and 2028 transitions. [2022-03-15 15:54:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:35,085 INFO L225 Difference]: With dead ends: 773 [2022-03-15 15:54:35,085 INFO L226 Difference]: Without dead ends: 773 [2022-03-15 15:54:35,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:35,085 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:35,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 245 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 567 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-03-15 15:54:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-03-15 15:54:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 658. [2022-03-15 15:54:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.765601217656012) internal successors, (1817), 657 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1817 transitions. [2022-03-15 15:54:35,092 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1817 transitions. Word has length 19 [2022-03-15 15:54:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:35,092 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1817 transitions. [2022-03-15 15:54:35,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1817 transitions. [2022-03-15 15:54:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:35,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:35,093 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:35,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:35,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:35,308 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1482881471, now seen corresponding path program 424 times [2022-03-15 15:54:35,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:35,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302027653] [2022-03-15 15:54:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:35,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:35,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:35,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302027653] [2022-03-15 15:54:35,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302027653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:35,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229087663] [2022-03-15 15:54:35,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:35,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:35,396 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:35,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-03-15 15:54:35,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:35,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:35,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:35,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:35,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:35,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:35,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:35,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:35,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:35,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:35,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:35,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229087663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:35,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:35,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:35,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574094937] [2022-03-15 15:54:35,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:35,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:35,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:35,712 INFO L87 Difference]: Start difference. First operand 658 states and 1817 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:36,205 INFO L93 Difference]: Finished difference Result 807 states and 2106 transitions. [2022-03-15 15:54:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:54:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:36,207 INFO L225 Difference]: With dead ends: 807 [2022-03-15 15:54:36,207 INFO L226 Difference]: Without dead ends: 807 [2022-03-15 15:54:36,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1815, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:54:36,207 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:36,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 173 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-03-15 15:54:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-15 15:54:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 655. [2022-03-15 15:54:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.764525993883792) internal successors, (1808), 654 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1808 transitions. [2022-03-15 15:54:36,214 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1808 transitions. Word has length 19 [2022-03-15 15:54:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:36,214 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1808 transitions. [2022-03-15 15:54:36,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1808 transitions. [2022-03-15 15:54:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:36,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:36,215 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:36,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-03-15 15:54:36,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:36,432 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:36,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 361746159, now seen corresponding path program 425 times [2022-03-15 15:54:36,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:36,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177968248] [2022-03-15 15:54:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:36,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:36,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177968248] [2022-03-15 15:54:36,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177968248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:36,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282265442] [2022-03-15 15:54:36,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:36,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:36,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:36,540 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:36,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-03-15 15:54:36,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:36,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:36,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:36,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:36,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:36,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:36,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:36,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:36,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:36,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:36,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:36,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:36,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282265442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:36,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:36,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:36,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404631326] [2022-03-15 15:54:36,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:36,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:36,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:36,901 INFO L87 Difference]: Start difference. First operand 655 states and 1808 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:37,212 INFO L93 Difference]: Finished difference Result 685 states and 1853 transitions. [2022-03-15 15:54:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:54:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:37,213 INFO L225 Difference]: With dead ends: 685 [2022-03-15 15:54:37,213 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 15:54:37,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:37,214 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:37,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 305 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-03-15 15:54:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 15:54:37,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 655. [2022-03-15 15:54:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.7599388379204894) internal successors, (1805), 654 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1805 transitions. [2022-03-15 15:54:37,220 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1805 transitions. Word has length 19 [2022-03-15 15:54:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:37,220 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1805 transitions. [2022-03-15 15:54:37,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1805 transitions. [2022-03-15 15:54:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:37,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:37,221 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:37,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:37,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-03-15 15:54:37,433 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1194041067, now seen corresponding path program 426 times [2022-03-15 15:54:37,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:37,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129660079] [2022-03-15 15:54:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:37,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:37,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129660079] [2022-03-15 15:54:37,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129660079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:37,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664143613] [2022-03-15 15:54:37,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:37,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:37,514 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:37,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-03-15 15:54:37,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:37,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:37,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:37,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:37,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:37,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:37,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:37,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:37,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:37,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:37,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664143613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:37,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:37,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:54:37,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155051188] [2022-03-15 15:54:37,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:37,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:37,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:37,825 INFO L87 Difference]: Start difference. First operand 655 states and 1805 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:38,208 INFO L93 Difference]: Finished difference Result 758 states and 1995 transitions. [2022-03-15 15:54:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:54:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:38,209 INFO L225 Difference]: With dead ends: 758 [2022-03-15 15:54:38,209 INFO L226 Difference]: Without dead ends: 758 [2022-03-15 15:54:38,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:54:38,209 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:38,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 207 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 599 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-15 15:54:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-15 15:54:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 657. [2022-03-15 15:54:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.760670731707317) internal successors, (1811), 656 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1811 transitions. [2022-03-15 15:54:38,216 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1811 transitions. Word has length 19 [2022-03-15 15:54:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:38,216 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1811 transitions. [2022-03-15 15:54:38,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1811 transitions. [2022-03-15 15:54:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:38,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:38,217 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:38,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:38,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-03-15 15:54:38,433 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 166075673, now seen corresponding path program 427 times [2022-03-15 15:54:38,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:38,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621517558] [2022-03-15 15:54:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:38,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:38,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621517558] [2022-03-15 15:54:38,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621517558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:38,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817636918] [2022-03-15 15:54:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:38,532 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:38,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-03-15 15:54:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:38,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:38,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:38,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:38,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:38,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:38,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:38,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:38,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:38,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:38,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817636918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:38,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:38,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:38,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246770473] [2022-03-15 15:54:38,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:38,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:38,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:38,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:38,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:38,870 INFO L87 Difference]: Start difference. First operand 657 states and 1811 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:39,177 INFO L93 Difference]: Finished difference Result 745 states and 1963 transitions. [2022-03-15 15:54:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:54:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:39,178 INFO L225 Difference]: With dead ends: 745 [2022-03-15 15:54:39,179 INFO L226 Difference]: Without dead ends: 745 [2022-03-15 15:54:39,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:39,179 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:39,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 219 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 517 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-03-15 15:54:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-03-15 15:54:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 652. [2022-03-15 15:54:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.7572964669738864) internal successors, (1795), 651 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1795 transitions. [2022-03-15 15:54:39,185 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1795 transitions. Word has length 19 [2022-03-15 15:54:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:39,186 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1795 transitions. [2022-03-15 15:54:39,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1795 transitions. [2022-03-15 15:54:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:39,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:39,186 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:39,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-03-15 15:54:39,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-03-15 15:54:39,401 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1169185091, now seen corresponding path program 428 times [2022-03-15 15:54:39,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:39,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468588088] [2022-03-15 15:54:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:39,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:39,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468588088] [2022-03-15 15:54:39,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468588088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:39,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049138816] [2022-03-15 15:54:39,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:39,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:39,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:39,474 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:39,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-03-15 15:54:39,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:39,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:39,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:39,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:39,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:39,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:39,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:39,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:39,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:39,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:54:39,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:39,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:54:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:39,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049138816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:39,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:39,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:54:39,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912545041] [2022-03-15 15:54:39,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:39,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:39,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:39,753 INFO L87 Difference]: Start difference. First operand 652 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:39,878 INFO L93 Difference]: Finished difference Result 674 states and 1832 transitions. [2022-03-15 15:54:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:39,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:39,879 INFO L225 Difference]: With dead ends: 674 [2022-03-15 15:54:39,879 INFO L226 Difference]: Without dead ends: 667 [2022-03-15 15:54:39,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:39,880 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:39,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-03-15 15:54:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-15 15:54:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 653. [2022-03-15 15:54:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7576687116564416) internal successors, (1798), 652 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1798 transitions. [2022-03-15 15:54:39,886 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1798 transitions. Word has length 19 [2022-03-15 15:54:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:39,886 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1798 transitions. [2022-03-15 15:54:39,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1798 transitions. [2022-03-15 15:54:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:39,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:39,887 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:39,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:40,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:40,102 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:40,102 INFO L85 PathProgramCache]: Analyzing trace with hash 251234901, now seen corresponding path program 429 times [2022-03-15 15:54:40,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:40,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862788675] [2022-03-15 15:54:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:40,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862788675] [2022-03-15 15:54:40,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862788675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:40,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074066088] [2022-03-15 15:54:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:40,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:40,170 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:40,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-03-15 15:54:40,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:40,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:40,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:40,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:40,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:40,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:40,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:54:40,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:40,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:54:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074066088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:40,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:40,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:54:40,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984478120] [2022-03-15 15:54:40,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:40,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:40,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:40,434 INFO L87 Difference]: Start difference. First operand 653 states and 1798 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:40,561 INFO L93 Difference]: Finished difference Result 670 states and 1822 transitions. [2022-03-15 15:54:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:40,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:40,561 INFO L225 Difference]: With dead ends: 670 [2022-03-15 15:54:40,562 INFO L226 Difference]: Without dead ends: 659 [2022-03-15 15:54:40,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:40,562 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:40,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-03-15 15:54:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-15 15:54:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 653. [2022-03-15 15:54:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.754601226993865) internal successors, (1796), 652 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1796 transitions. [2022-03-15 15:54:40,568 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1796 transitions. Word has length 19 [2022-03-15 15:54:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:40,568 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1796 transitions. [2022-03-15 15:54:40,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1796 transitions. [2022-03-15 15:54:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:40,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:40,569 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:40,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-03-15 15:54:40,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2022-03-15 15:54:40,784 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash -125665805, now seen corresponding path program 430 times [2022-03-15 15:54:40,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:40,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086270446] [2022-03-15 15:54:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:40,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086270446] [2022-03-15 15:54:40,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086270446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:40,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940058084] [2022-03-15 15:54:40,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:40,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:40,886 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:40,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-03-15 15:54:40,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:40,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:40,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:41,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:41,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:41,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:41,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:41,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:41,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:41,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:41,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:41,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940058084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:41,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:41,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:54:41,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280696017] [2022-03-15 15:54:41,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:41,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:41,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:41,164 INFO L87 Difference]: Start difference. First operand 653 states and 1796 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:41,620 INFO L93 Difference]: Finished difference Result 803 states and 2089 transitions. [2022-03-15 15:54:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:41,621 INFO L225 Difference]: With dead ends: 803 [2022-03-15 15:54:41,621 INFO L226 Difference]: Without dead ends: 803 [2022-03-15 15:54:41,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:54:41,622 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:41,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 234 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-03-15 15:54:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-15 15:54:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 648. [2022-03-15 15:54:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7573415765069553) internal successors, (1784), 647 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1784 transitions. [2022-03-15 15:54:41,629 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1784 transitions. Word has length 19 [2022-03-15 15:54:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1784 transitions. [2022-03-15 15:54:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1784 transitions. [2022-03-15 15:54:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:41,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:41,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:41,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:41,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:41,846 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash 178526067, now seen corresponding path program 431 times [2022-03-15 15:54:41,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:41,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856490484] [2022-03-15 15:54:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:41,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:41,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:41,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856490484] [2022-03-15 15:54:41,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856490484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:41,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952577960] [2022-03-15 15:54:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:41,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:41,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:41,930 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:41,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-03-15 15:54:41,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:54:41,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:42,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:42,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:42,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:54:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:42,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:42,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:42,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:42,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:42,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:42,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952577960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:42,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:42,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:42,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068708318] [2022-03-15 15:54:42,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:42,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:42,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:42,329 INFO L87 Difference]: Start difference. First operand 648 states and 1784 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:42,522 INFO L93 Difference]: Finished difference Result 726 states and 1946 transitions. [2022-03-15 15:54:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:54:42,522 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:42,523 INFO L225 Difference]: With dead ends: 726 [2022-03-15 15:54:42,523 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 15:54:42,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:42,523 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:42,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 149 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 514 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-03-15 15:54:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 15:54:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 649. [2022-03-15 15:54:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.757716049382716) internal successors, (1787), 648 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1787 transitions. [2022-03-15 15:54:42,530 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1787 transitions. Word has length 19 [2022-03-15 15:54:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:42,530 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1787 transitions. [2022-03-15 15:54:42,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1787 transitions. [2022-03-15 15:54:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:42,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:42,531 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:42,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-03-15 15:54:42,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-03-15 15:54:42,731 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash -216930237, now seen corresponding path program 432 times [2022-03-15 15:54:42,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:42,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307444074] [2022-03-15 15:54:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:42,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:42,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:42,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307444074] [2022-03-15 15:54:42,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307444074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:42,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767745408] [2022-03-15 15:54:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:42,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:42,827 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:42,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-03-15 15:54:42,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:42,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:43,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:43,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:54:43,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:43,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:54:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:43,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:43,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:43,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:54:43,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:43,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:54:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:43,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767745408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:43,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:43,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:54:43,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467703551] [2022-03-15 15:54:43,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:43,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:43,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:43,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:43,252 INFO L87 Difference]: Start difference. First operand 649 states and 1787 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:43,397 INFO L93 Difference]: Finished difference Result 666 states and 1813 transitions. [2022-03-15 15:54:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:54:43,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:43,399 INFO L225 Difference]: With dead ends: 666 [2022-03-15 15:54:43,399 INFO L226 Difference]: Without dead ends: 653 [2022-03-15 15:54:43,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:43,399 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:43,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 329 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-03-15 15:54:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-15 15:54:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 647. [2022-03-15 15:54:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.760061919504644) internal successors, (1783), 646 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1783 transitions. [2022-03-15 15:54:43,407 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1783 transitions. Word has length 19 [2022-03-15 15:54:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:43,407 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1783 transitions. [2022-03-15 15:54:43,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1783 transitions. [2022-03-15 15:54:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:43,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:43,408 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:43,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:43,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-03-15 15:54:43,608 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1593176761, now seen corresponding path program 433 times [2022-03-15 15:54:43,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:43,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738155962] [2022-03-15 15:54:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:43,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:43,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:43,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738155962] [2022-03-15 15:54:43,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738155962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:43,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966557538] [2022-03-15 15:54:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:43,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:43,780 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:43,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-03-15 15:54:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:44,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:44,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:54:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:44,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:44,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:44,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:44,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:44,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:44,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966557538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:44,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:44,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:44,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073538035] [2022-03-15 15:54:44,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:44,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:44,175 INFO L87 Difference]: Start difference. First operand 647 states and 1783 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:44,486 INFO L93 Difference]: Finished difference Result 780 states and 2054 transitions. [2022-03-15 15:54:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:54:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:44,487 INFO L225 Difference]: With dead ends: 780 [2022-03-15 15:54:44,487 INFO L226 Difference]: Without dead ends: 780 [2022-03-15 15:54:44,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:54:44,487 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:44,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 135 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 481 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-03-15 15:54:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-15 15:54:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 648. [2022-03-15 15:54:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7604327666151467) internal successors, (1786), 647 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1786 transitions. [2022-03-15 15:54:44,495 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1786 transitions. Word has length 19 [2022-03-15 15:54:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:44,495 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1786 transitions. [2022-03-15 15:54:44,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1786 transitions. [2022-03-15 15:54:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:44,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:44,496 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:44,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:44,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:44,713 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1511781133, now seen corresponding path program 434 times [2022-03-15 15:54:44,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:44,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907212406] [2022-03-15 15:54:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:44,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:44,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907212406] [2022-03-15 15:54:44,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907212406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:44,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721034983] [2022-03-15 15:54:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:44,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:44,788 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:44,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-03-15 15:54:44,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:44,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:44,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:44,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:44,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:45,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:45,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:45,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:45,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:45,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721034983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:45,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:45,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:45,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143434986] [2022-03-15 15:54:45,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:45,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:45,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:45,103 INFO L87 Difference]: Start difference. First operand 648 states and 1786 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:45,618 INFO L93 Difference]: Finished difference Result 866 states and 2208 transitions. [2022-03-15 15:54:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:54:45,618 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:45,619 INFO L225 Difference]: With dead ends: 866 [2022-03-15 15:54:45,619 INFO L226 Difference]: Without dead ends: 866 [2022-03-15 15:54:45,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:54:45,620 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:45,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 204 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 699 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-03-15 15:54:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-15 15:54:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 647. [2022-03-15 15:54:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.764705882352941) internal successors, (1786), 646 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1786 transitions. [2022-03-15 15:54:45,626 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1786 transitions. Word has length 19 [2022-03-15 15:54:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:45,626 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1786 transitions. [2022-03-15 15:54:45,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1786 transitions. [2022-03-15 15:54:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:45,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:45,627 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:45,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-03-15 15:54:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2022-03-15 15:54:45,835 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1915736515, now seen corresponding path program 435 times [2022-03-15 15:54:45,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:45,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377665856] [2022-03-15 15:54:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:45,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:45,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377665856] [2022-03-15 15:54:45,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377665856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:45,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994256048] [2022-03-15 15:54:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:45,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:45,956 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:45,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-03-15 15:54:45,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:54:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:46,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:46,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:46,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:46,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:46,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:46,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:46,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:46,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:46,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:46,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994256048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:46,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:46,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:46,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096039792] [2022-03-15 15:54:46,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:46,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:46,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:46,326 INFO L87 Difference]: Start difference. First operand 647 states and 1786 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:46,788 INFO L93 Difference]: Finished difference Result 730 states and 1926 transitions. [2022-03-15 15:54:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:46,789 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:54:46,789 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:54:46,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:54:46,790 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:46,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 155 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 505 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-03-15 15:54:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:54:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 648. [2022-03-15 15:54:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7635239567233385) internal successors, (1788), 647 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1788 transitions. [2022-03-15 15:54:46,796 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1788 transitions. Word has length 19 [2022-03-15 15:54:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:46,797 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1788 transitions. [2022-03-15 15:54:46,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1788 transitions. [2022-03-15 15:54:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:46,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:46,797 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:46,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:47,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:47,006 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash -151664393, now seen corresponding path program 436 times [2022-03-15 15:54:47,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:47,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033175507] [2022-03-15 15:54:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:47,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:47,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033175507] [2022-03-15 15:54:47,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033175507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:47,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148972275] [2022-03-15 15:54:47,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:47,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:47,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:47,136 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:47,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-03-15 15:54:47,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:47,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:47,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:47,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:47,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:47,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:47,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:47,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:47,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:47,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:47,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148972275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:47,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:47,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:47,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156015283] [2022-03-15 15:54:47,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:47,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:47,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:47,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:47,513 INFO L87 Difference]: Start difference. First operand 648 states and 1788 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:47,896 INFO L93 Difference]: Finished difference Result 712 states and 1899 transitions. [2022-03-15 15:54:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:47,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:47,897 INFO L225 Difference]: With dead ends: 712 [2022-03-15 15:54:47,897 INFO L226 Difference]: Without dead ends: 712 [2022-03-15 15:54:47,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:47,898 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:47,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 195 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 562 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-03-15 15:54:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-15 15:54:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 646. [2022-03-15 15:54:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7612403100775196) internal successors, (1781), 645 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1781 transitions. [2022-03-15 15:54:47,904 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1781 transitions. Word has length 19 [2022-03-15 15:54:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:47,904 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1781 transitions. [2022-03-15 15:54:47,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1781 transitions. [2022-03-15 15:54:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:47,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:47,905 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:47,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-03-15 15:54:48,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-03-15 15:54:48,114 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash -546586809, now seen corresponding path program 437 times [2022-03-15 15:54:48,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:48,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848890917] [2022-03-15 15:54:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:48,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:48,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:48,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848890917] [2022-03-15 15:54:48,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848890917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:48,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421623238] [2022-03-15 15:54:48,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:48,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:48,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:48,221 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:48,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-03-15 15:54:48,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:48,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:48,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:48,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:48,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:48,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:48,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:48,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:48,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:48,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421623238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:48,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:48,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:48,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102760637] [2022-03-15 15:54:48,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:48,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:48,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:48,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:48,611 INFO L87 Difference]: Start difference. First operand 646 states and 1781 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:49,121 INFO L93 Difference]: Finished difference Result 785 states and 2058 transitions. [2022-03-15 15:54:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:54:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:49,122 INFO L225 Difference]: With dead ends: 785 [2022-03-15 15:54:49,122 INFO L226 Difference]: Without dead ends: 783 [2022-03-15 15:54:49,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:54:49,122 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:49,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 151 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 512 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-03-15 15:54:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-15 15:54:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 644. [2022-03-15 15:54:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.7636080870917574) internal successors, (1777), 643 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1777 transitions. [2022-03-15 15:54:49,131 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1777 transitions. Word has length 19 [2022-03-15 15:54:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:49,131 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1777 transitions. [2022-03-15 15:54:49,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1777 transitions. [2022-03-15 15:54:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:49,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:49,132 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:49,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:49,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:49,353 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 755798087, now seen corresponding path program 438 times [2022-03-15 15:54:49,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:49,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905066820] [2022-03-15 15:54:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:49,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:49,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905066820] [2022-03-15 15:54:49,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905066820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:49,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70438796] [2022-03-15 15:54:49,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:49,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:49,441 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:49,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-03-15 15:54:49,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:49,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:49,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:49,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:49,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:49,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:49,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:49,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:54:49,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:49,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:54:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:49,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70438796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:49,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:49,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:49,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195044698] [2022-03-15 15:54:49,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:49,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:49,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:49,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:49,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:49,677 INFO L87 Difference]: Start difference. First operand 644 states and 1777 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:49,998 INFO L93 Difference]: Finished difference Result 739 states and 1949 transitions. [2022-03-15 15:54:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:50,000 INFO L225 Difference]: With dead ends: 739 [2022-03-15 15:54:50,000 INFO L226 Difference]: Without dead ends: 737 [2022-03-15 15:54:50,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:50,000 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:50,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 219 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-03-15 15:54:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 646. [2022-03-15 15:54:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7705426356589147) internal successors, (1787), 645 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1787 transitions. [2022-03-15 15:54:50,007 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1787 transitions. Word has length 19 [2022-03-15 15:54:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:50,007 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1787 transitions. [2022-03-15 15:54:50,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1787 transitions. [2022-03-15 15:54:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:50,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:50,008 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:50,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-03-15 15:54:50,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2022-03-15 15:54:50,216 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -722573121, now seen corresponding path program 439 times [2022-03-15 15:54:50,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:50,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601349370] [2022-03-15 15:54:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:50,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:50,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601349370] [2022-03-15 15:54:50,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601349370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:50,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571733847] [2022-03-15 15:54:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:50,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:50,314 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:50,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-03-15 15:54:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:50,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:54:50,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:50,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:54:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:50,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:50,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:50,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:50,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:50,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:50,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571733847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:50,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:50,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:50,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106985543] [2022-03-15 15:54:50,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:50,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:50,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:50,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:50,641 INFO L87 Difference]: Start difference. First operand 646 states and 1787 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:50,826 INFO L93 Difference]: Finished difference Result 760 states and 2012 transitions. [2022-03-15 15:54:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:50,827 INFO L225 Difference]: With dead ends: 760 [2022-03-15 15:54:50,827 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 15:54:50,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:50,828 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:50,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 200 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 484 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-03-15 15:54:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 15:54:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 651. [2022-03-15 15:54:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.7784615384615385) internal successors, (1806), 650 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1806 transitions. [2022-03-15 15:54:50,835 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1806 transitions. Word has length 19 [2022-03-15 15:54:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:50,835 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1806 transitions. [2022-03-15 15:54:50,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1806 transitions. [2022-03-15 15:54:50,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:50,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:50,836 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:50,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Ended with exit code 0 [2022-03-15 15:54:51,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-03-15 15:54:51,053 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash -641177493, now seen corresponding path program 440 times [2022-03-15 15:54:51,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:51,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929057859] [2022-03-15 15:54:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:51,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:51,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:51,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929057859] [2022-03-15 15:54:51,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929057859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:51,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295503311] [2022-03-15 15:54:51,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:51,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:51,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:51,143 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:51,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-03-15 15:54:51,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:51,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:51,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:51,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:51,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:51,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:51,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:51,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:51,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:51,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:51,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:51,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:51,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:51,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295503311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:51,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:51,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:51,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610355531] [2022-03-15 15:54:51,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:51,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:51,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:51,503 INFO L87 Difference]: Start difference. First operand 651 states and 1806 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:51,695 INFO L93 Difference]: Finished difference Result 749 states and 1983 transitions. [2022-03-15 15:54:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:54:51,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:51,696 INFO L225 Difference]: With dead ends: 749 [2022-03-15 15:54:51,696 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 15:54:51,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:51,696 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:51,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 204 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 618 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-03-15 15:54:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 15:54:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 655. [2022-03-15 15:54:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.782874617737003) internal successors, (1820), 654 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1820 transitions. [2022-03-15 15:54:51,703 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1820 transitions. Word has length 19 [2022-03-15 15:54:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1820 transitions. [2022-03-15 15:54:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1820 transitions. [2022-03-15 15:54:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:51,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:51,704 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:51,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-03-15 15:54:51,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-03-15 15:54:51,919 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:51,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 324016831, now seen corresponding path program 441 times [2022-03-15 15:54:51,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:51,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129925559] [2022-03-15 15:54:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:51,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:52,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:52,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129925559] [2022-03-15 15:54:52,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129925559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:52,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540025654] [2022-03-15 15:54:52,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:52,011 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:52,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-03-15 15:54:52,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:54:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:52,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:52,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:52,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:52,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:52,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:52,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:52,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:52,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:52,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:54:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:52,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540025654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:52,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:52,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:52,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549986400] [2022-03-15 15:54:52,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:52,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:52,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:52,326 INFO L87 Difference]: Start difference. First operand 655 states and 1820 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:52,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:52,498 INFO L93 Difference]: Finished difference Result 762 states and 2019 transitions. [2022-03-15 15:54:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:52,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:52,499 INFO L225 Difference]: With dead ends: 762 [2022-03-15 15:54:52,499 INFO L226 Difference]: Without dead ends: 758 [2022-03-15 15:54:52,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:52,499 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:52,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 153 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 449 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:54:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-15 15:54:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 655. [2022-03-15 15:54:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.779816513761468) internal successors, (1818), 654 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1818 transitions. [2022-03-15 15:54:52,506 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1818 transitions. Word has length 19 [2022-03-15 15:54:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:52,506 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1818 transitions. [2022-03-15 15:54:52,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1818 transitions. [2022-03-15 15:54:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:52,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:52,507 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:52,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-03-15 15:54:52,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-03-15 15:54:52,713 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1211312483, now seen corresponding path program 442 times [2022-03-15 15:54:52,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:52,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948057498] [2022-03-15 15:54:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:52,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:52,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948057498] [2022-03-15 15:54:52,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948057498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:52,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295002244] [2022-03-15 15:54:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:52,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:52,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:52,828 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:52,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-03-15 15:54:52,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:52,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:52,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:52,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:52,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:53,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:53,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:54:53,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:53,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:54:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:53,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295002244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:53,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:53,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:53,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810380923] [2022-03-15 15:54:53,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:53,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:53,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:53,224 INFO L87 Difference]: Start difference. First operand 655 states and 1818 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:53,740 INFO L93 Difference]: Finished difference Result 785 states and 2041 transitions. [2022-03-15 15:54:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:53,741 INFO L225 Difference]: With dead ends: 785 [2022-03-15 15:54:53,742 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 15:54:53,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:53,742 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:53,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 211 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:54:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 15:54:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 657. [2022-03-15 15:54:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7820121951219514) internal successors, (1825), 656 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1825 transitions. [2022-03-15 15:54:53,763 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1825 transitions. Word has length 19 [2022-03-15 15:54:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:53,763 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1825 transitions. [2022-03-15 15:54:53,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1825 transitions. [2022-03-15 15:54:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:53,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:53,764 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:53,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-03-15 15:54:53,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:53,980 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 148804257, now seen corresponding path program 443 times [2022-03-15 15:54:53,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:53,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083004620] [2022-03-15 15:54:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:54,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:54,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083004620] [2022-03-15 15:54:54,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083004620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:54,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271345603] [2022-03-15 15:54:54,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:54,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:54,112 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:54,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-03-15 15:54:54,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:54:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:54,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:54,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:54,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:54,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:54,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:54,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:54,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:54,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:54,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:54,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271345603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:54,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:54,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:54,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196894205] [2022-03-15 15:54:54,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:54,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:54,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:54,375 INFO L87 Difference]: Start difference. First operand 657 states and 1825 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:54,899 INFO L93 Difference]: Finished difference Result 796 states and 2106 transitions. [2022-03-15 15:54:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:54:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:54,900 INFO L225 Difference]: With dead ends: 796 [2022-03-15 15:54:54,900 INFO L226 Difference]: Without dead ends: 796 [2022-03-15 15:54:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:54:54,901 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:54,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 231 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-03-15 15:54:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 664. [2022-03-15 15:54:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.793363499245852) internal successors, (1852), 663 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1852 transitions. [2022-03-15 15:54:54,908 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1852 transitions. Word has length 19 [2022-03-15 15:54:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:54,909 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1852 transitions. [2022-03-15 15:54:54,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1852 transitions. [2022-03-15 15:54:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:54,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:54,909 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:54,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Ended with exit code 0 [2022-03-15 15:54:55,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2022-03-15 15:54:55,125 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1997366503, now seen corresponding path program 444 times [2022-03-15 15:54:55,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:55,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385287755] [2022-03-15 15:54:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:55,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:55,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385287755] [2022-03-15 15:54:55,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385287755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:55,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640109386] [2022-03-15 15:54:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:55,238 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:55,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-03-15 15:54:55,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:55,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:55,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:55,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:55,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:54:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:55,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:55,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:55,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:55,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:55,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:54:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:55,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640109386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:55,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:55,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:55,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977789281] [2022-03-15 15:54:55,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:55,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:55,480 INFO L87 Difference]: Start difference. First operand 664 states and 1852 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:55,749 INFO L93 Difference]: Finished difference Result 759 states and 2025 transitions. [2022-03-15 15:54:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:54:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:55,751 INFO L225 Difference]: With dead ends: 759 [2022-03-15 15:54:55,751 INFO L226 Difference]: Without dead ends: 759 [2022-03-15 15:54:55,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:54:55,751 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:55,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 181 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-15 15:54:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 655. [2022-03-15 15:54:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.782874617737003) internal successors, (1820), 654 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1820 transitions. [2022-03-15 15:54:55,764 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1820 transitions. Word has length 19 [2022-03-15 15:54:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:55,764 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1820 transitions. [2022-03-15 15:54:55,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1820 transitions. [2022-03-15 15:54:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:55,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:55,764 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:55,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-03-15 15:54:55,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:55,980 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:55,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1976970205, now seen corresponding path program 445 times [2022-03-15 15:54:55,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:55,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613748136] [2022-03-15 15:54:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:56,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:56,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613748136] [2022-03-15 15:54:56,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613748136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:56,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122086445] [2022-03-15 15:54:56,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:56,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:56,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:56,052 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:56,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-03-15 15:54:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:56,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:56,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:54:56,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:56,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:54:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:56,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:56,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:56,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:54:56,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:56,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:54:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:56,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122086445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:56,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:56,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:54:56,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110184256] [2022-03-15 15:54:56,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:56,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:54:56,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:54:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:54:56,291 INFO L87 Difference]: Start difference. First operand 655 states and 1820 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:56,628 INFO L93 Difference]: Finished difference Result 720 states and 1921 transitions. [2022-03-15 15:54:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:54:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:56,629 INFO L225 Difference]: With dead ends: 720 [2022-03-15 15:54:56,629 INFO L226 Difference]: Without dead ends: 716 [2022-03-15 15:54:56,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:56,629 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:56,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 179 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-15 15:54:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 656. [2022-03-15 15:54:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.781679389312977) internal successors, (1822), 655 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1822 transitions. [2022-03-15 15:54:56,636 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1822 transitions. Word has length 19 [2022-03-15 15:54:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:56,636 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1822 transitions. [2022-03-15 15:54:56,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1822 transitions. [2022-03-15 15:54:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:56,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:56,637 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:56,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-03-15 15:54:56,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:56,852 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash 661207403, now seen corresponding path program 446 times [2022-03-15 15:54:56,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:56,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190657240] [2022-03-15 15:54:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:56,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:56,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:56,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190657240] [2022-03-15 15:54:56,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190657240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:56,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808492930] [2022-03-15 15:54:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:56,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:56,982 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:56,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-03-15 15:54:57,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:57,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:57,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:57,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:57,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:57,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:57,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:57,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:54:57,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:57,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:54:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:57,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808492930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:57,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:57,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:57,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429852341] [2022-03-15 15:54:57,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:57,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:57,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:57,374 INFO L87 Difference]: Start difference. First operand 656 states and 1822 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:57,842 INFO L93 Difference]: Finished difference Result 779 states and 2025 transitions. [2022-03-15 15:54:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:54:57,842 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:57,843 INFO L225 Difference]: With dead ends: 779 [2022-03-15 15:54:57,843 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:54:57,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:54:57,844 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:57,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 219 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:54:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 660. [2022-03-15 15:54:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7814871016691955) internal successors, (1833), 659 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1833 transitions. [2022-03-15 15:54:57,850 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1833 transitions. Word has length 19 [2022-03-15 15:54:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:57,851 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1833 transitions. [2022-03-15 15:54:57,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1833 transitions. [2022-03-15 15:54:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:57,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:57,851 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:57,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:58,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:58,067 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:58,067 INFO L85 PathProgramCache]: Analyzing trace with hash -206242245, now seen corresponding path program 447 times [2022-03-15 15:54:58,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:58,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509332871] [2022-03-15 15:54:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:58,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:58,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:58,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509332871] [2022-03-15 15:54:58,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509332871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:58,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929586475] [2022-03-15 15:54:58,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:58,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:58,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:58,154 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:58,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-03-15 15:54:58,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:54:58,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:54:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:58,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:58,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:54:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:58,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:54:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:58,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:58,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:58,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:58,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:58,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:54:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:58,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929586475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:58,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:58,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:54:58,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152017315] [2022-03-15 15:54:58,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:58,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:58,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:58,536 INFO L87 Difference]: Start difference. First operand 660 states and 1833 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:59,276 INFO L93 Difference]: Finished difference Result 778 states and 2077 transitions. [2022-03-15 15:54:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:54:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:54:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:59,277 INFO L225 Difference]: With dead ends: 778 [2022-03-15 15:54:59,277 INFO L226 Difference]: Without dead ends: 766 [2022-03-15 15:54:59,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:54:59,277 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 126 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:59,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 126 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-03-15 15:54:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 679. [2022-03-15 15:54:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.797935103244838) internal successors, (1897), 678 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1897 transitions. [2022-03-15 15:54:59,285 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1897 transitions. Word has length 19 [2022-03-15 15:54:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:59,285 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1897 transitions. [2022-03-15 15:54:59,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1897 transitions. [2022-03-15 15:54:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:54:59,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:59,285 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:59,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-03-15 15:54:59,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2022-03-15 15:54:59,495 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2021324143, now seen corresponding path program 448 times [2022-03-15 15:54:59,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:59,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507572547] [2022-03-15 15:54:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:59,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:59,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507572547] [2022-03-15 15:54:59,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507572547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:59,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980437181] [2022-03-15 15:54:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:59,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:59,596 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:59,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-03-15 15:54:59,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:59,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:59,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:54:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:59,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:59,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:54:59,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:59,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:54:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:59,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:59,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:59,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:54:59,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:59,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:54:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:59,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980437181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:59,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:59,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:54:59,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870418344] [2022-03-15 15:54:59,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:59,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:59,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:59,985 INFO L87 Difference]: Start difference. First operand 679 states and 1897 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:00,773 INFO L93 Difference]: Finished difference Result 780 states and 2089 transitions. [2022-03-15 15:55:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:55:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:00,774 INFO L225 Difference]: With dead ends: 780 [2022-03-15 15:55:00,774 INFO L226 Difference]: Without dead ends: 780 [2022-03-15 15:55:00,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:55:00,775 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:00,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 199 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-15 15:55:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 669. [2022-03-15 15:55:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.784431137724551) internal successors, (1860), 668 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1860 transitions. [2022-03-15 15:55:00,782 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1860 transitions. Word has length 19 [2022-03-15 15:55:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:00,782 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1860 transitions. [2022-03-15 15:55:00,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1860 transitions. [2022-03-15 15:55:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:00,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:00,783 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:00,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:00,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2022-03-15 15:55:00,998 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1626401727, now seen corresponding path program 449 times [2022-03-15 15:55:00,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:00,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384835311] [2022-03-15 15:55:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:01,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:01,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384835311] [2022-03-15 15:55:01,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384835311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:01,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164646780] [2022-03-15 15:55:01,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:01,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:01,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:01,082 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:01,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-03-15 15:55:01,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:01,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:01,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:01,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:01,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:01,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:01,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:01,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:01,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:01,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:01,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164646780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:01,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:01,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:01,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669354841] [2022-03-15 15:55:01,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:01,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:01,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:01,383 INFO L87 Difference]: Start difference. First operand 669 states and 1860 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:01,822 INFO L93 Difference]: Finished difference Result 751 states and 1988 transitions. [2022-03-15 15:55:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:01,823 INFO L225 Difference]: With dead ends: 751 [2022-03-15 15:55:01,823 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 15:55:01,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:55:01,823 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:01,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 200 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 15:55:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 668. [2022-03-15 15:55:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.7841079460269866) internal successors, (1857), 667 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1857 transitions. [2022-03-15 15:55:01,830 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1857 transitions. Word has length 19 [2022-03-15 15:55:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:01,830 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1857 transitions. [2022-03-15 15:55:01,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1857 transitions. [2022-03-15 15:55:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:01,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:01,831 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:01,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-03-15 15:55:02,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-03-15 15:55:02,047 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash -124846617, now seen corresponding path program 450 times [2022-03-15 15:55:02,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:02,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466028193] [2022-03-15 15:55:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:02,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:02,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466028193] [2022-03-15 15:55:02,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466028193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:02,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769681970] [2022-03-15 15:55:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:02,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:02,120 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:02,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-03-15 15:55:02,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:55:02,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:02,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:02,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:02,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:55:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:02,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:02,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:02,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:02,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:02,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:02,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769681970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:02,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:02,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:02,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478944984] [2022-03-15 15:55:02,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:02,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:02,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:02,380 INFO L87 Difference]: Start difference. First operand 668 states and 1857 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:02,796 INFO L93 Difference]: Finished difference Result 730 states and 1978 transitions. [2022-03-15 15:55:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:55:02,796 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:02,797 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:55:02,797 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 15:55:02,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:55:02,797 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:02,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 105 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 15:55:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 657. [2022-03-15 15:55:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.774390243902439) internal successors, (1820), 656 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1820 transitions. [2022-03-15 15:55:02,804 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1820 transitions. Word has length 19 [2022-03-15 15:55:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:02,804 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1820 transitions. [2022-03-15 15:55:02,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1820 transitions. [2022-03-15 15:55:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:02,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:02,805 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:02,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:03,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-03-15 15:55:03,021 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2063336559, now seen corresponding path program 451 times [2022-03-15 15:55:03,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:03,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199956964] [2022-03-15 15:55:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:03,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:03,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199956964] [2022-03-15 15:55:03,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199956964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:03,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678097542] [2022-03-15 15:55:03,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:03,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:03,086 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:03,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-03-15 15:55:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:03,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:03,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:03,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:03,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:03,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:03,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:03,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:03,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:03,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:03,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:03,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678097542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:03,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:03,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:03,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258448528] [2022-03-15 15:55:03,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:03,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:03,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:03,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:03,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:03,336 INFO L87 Difference]: Start difference. First operand 657 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:03,536 INFO L93 Difference]: Finished difference Result 713 states and 1929 transitions. [2022-03-15 15:55:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:03,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:03,537 INFO L225 Difference]: With dead ends: 713 [2022-03-15 15:55:03,537 INFO L226 Difference]: Without dead ends: 713 [2022-03-15 15:55:03,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:03,537 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:03,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 134 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-15 15:55:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 650. [2022-03-15 15:55:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.7704160246533127) internal successors, (1798), 649 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1798 transitions. [2022-03-15 15:55:03,543 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1798 transitions. Word has length 19 [2022-03-15 15:55:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:03,543 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1798 transitions. [2022-03-15 15:55:03,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1798 transitions. [2022-03-15 15:55:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:03,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:03,544 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:03,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:03,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:03,755 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash 507913629, now seen corresponding path program 452 times [2022-03-15 15:55:03,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:03,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137848775] [2022-03-15 15:55:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:03,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:03,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137848775] [2022-03-15 15:55:03,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137848775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:03,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231052527] [2022-03-15 15:55:03,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:03,903 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:03,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-03-15 15:55:03,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:03,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:04,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:04,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:04,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:04,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:04,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:04,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:04,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:04,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:04,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:04,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231052527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:04,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:04,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:04,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196087945] [2022-03-15 15:55:04,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:04,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:04,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:04,216 INFO L87 Difference]: Start difference. First operand 650 states and 1798 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:04,519 INFO L93 Difference]: Finished difference Result 736 states and 1946 transitions. [2022-03-15 15:55:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:04,521 INFO L225 Difference]: With dead ends: 736 [2022-03-15 15:55:04,521 INFO L226 Difference]: Without dead ends: 736 [2022-03-15 15:55:04,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:04,521 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:04,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 209 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-15 15:55:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 652. [2022-03-15 15:55:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.769585253456221) internal successors, (1803), 651 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1803 transitions. [2022-03-15 15:55:04,528 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1803 transitions. Word has length 19 [2022-03-15 15:55:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:04,528 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1803 transitions. [2022-03-15 15:55:04,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1803 transitions. [2022-03-15 15:55:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:04,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:04,529 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:04,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Ended with exit code 0 [2022-03-15 15:55:04,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:04,735 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1868030369, now seen corresponding path program 453 times [2022-03-15 15:55:04,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:04,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854476498] [2022-03-15 15:55:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:04,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:04,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854476498] [2022-03-15 15:55:04,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854476498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:04,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048412377] [2022-03-15 15:55:04,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:04,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:04,845 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:04,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-03-15 15:55:04,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:04,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:04,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:04,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:04,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:04,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:04,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:05,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:05,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:05,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:05,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:05,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048412377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:05,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:05,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:05,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938005002] [2022-03-15 15:55:05,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:05,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:05,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:05,149 INFO L87 Difference]: Start difference. First operand 652 states and 1803 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:05,818 INFO L93 Difference]: Finished difference Result 765 states and 2027 transitions. [2022-03-15 15:55:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:55:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:05,819 INFO L225 Difference]: With dead ends: 765 [2022-03-15 15:55:05,819 INFO L226 Difference]: Without dead ends: 765 [2022-03-15 15:55:05,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:55:05,819 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:05,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 244 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-15 15:55:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 658. [2022-03-15 15:55:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.774733637747336) internal successors, (1823), 657 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1823 transitions. [2022-03-15 15:55:05,826 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1823 transitions. Word has length 19 [2022-03-15 15:55:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:05,826 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1823 transitions. [2022-03-15 15:55:05,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1823 transitions. [2022-03-15 15:55:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:05,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:05,827 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:05,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:06,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-03-15 15:55:06,042 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash -278140391, now seen corresponding path program 454 times [2022-03-15 15:55:06,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:06,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534075288] [2022-03-15 15:55:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:06,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:06,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:06,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534075288] [2022-03-15 15:55:06,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534075288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:06,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036084878] [2022-03-15 15:55:06,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:06,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:06,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:06,125 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:06,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-03-15 15:55:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:06,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:06,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:06,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:06,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:06,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:06,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:55:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:06,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:06,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:06,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:06,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:06,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:06,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036084878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:06,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:06,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:06,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836950569] [2022-03-15 15:55:06,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:06,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:06,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:06,426 INFO L87 Difference]: Start difference. First operand 658 states and 1823 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:07,097 INFO L93 Difference]: Finished difference Result 744 states and 1996 transitions. [2022-03-15 15:55:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:55:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:07,098 INFO L225 Difference]: With dead ends: 744 [2022-03-15 15:55:07,098 INFO L226 Difference]: Without dead ends: 744 [2022-03-15 15:55:07,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:55:07,098 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:07,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 130 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-15 15:55:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 658. [2022-03-15 15:55:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.774733637747336) internal successors, (1823), 657 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1823 transitions. [2022-03-15 15:55:07,105 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1823 transitions. Word has length 19 [2022-03-15 15:55:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:07,105 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1823 transitions. [2022-03-15 15:55:07,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1823 transitions. [2022-03-15 15:55:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:07,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:07,106 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:07,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Ended with exit code 0 [2022-03-15 15:55:07,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-03-15 15:55:07,322 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash -598770979, now seen corresponding path program 455 times [2022-03-15 15:55:07,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:07,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760791936] [2022-03-15 15:55:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:07,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:07,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:07,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760791936] [2022-03-15 15:55:07,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760791936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:07,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462852232] [2022-03-15 15:55:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:07,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:07,447 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:07,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-03-15 15:55:07,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:07,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:07,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:07,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:07,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:07,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:07,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:55:07,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:07,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:55:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:07,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462852232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:07,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:07,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:07,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728997617] [2022-03-15 15:55:07,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:07,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:07,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:07,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:07,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:07,823 INFO L87 Difference]: Start difference. First operand 658 states and 1823 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:08,251 INFO L93 Difference]: Finished difference Result 693 states and 1873 transitions. [2022-03-15 15:55:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:55:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:08,252 INFO L225 Difference]: With dead ends: 693 [2022-03-15 15:55:08,253 INFO L226 Difference]: Without dead ends: 689 [2022-03-15 15:55:08,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:08,253 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:08,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-03-15 15:55:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 656. [2022-03-15 15:55:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7740458015267175) internal successors, (1817), 655 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1817 transitions. [2022-03-15 15:55:08,259 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1817 transitions. Word has length 19 [2022-03-15 15:55:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:08,259 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1817 transitions. [2022-03-15 15:55:08,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1817 transitions. [2022-03-15 15:55:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:08,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:08,260 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:08,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:08,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:08,476 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1910042785, now seen corresponding path program 456 times [2022-03-15 15:55:08,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:08,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629671194] [2022-03-15 15:55:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:08,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:08,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:08,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629671194] [2022-03-15 15:55:08,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629671194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:08,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540315573] [2022-03-15 15:55:08,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:08,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:08,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:08,582 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:08,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-03-15 15:55:08,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:55:08,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:08,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:08,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:08,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:08,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:08,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:08,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:08,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:08,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:08,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540315573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:08,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:08,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:08,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910238862] [2022-03-15 15:55:08,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:08,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:08,989 INFO L87 Difference]: Start difference. First operand 656 states and 1817 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:09,497 INFO L93 Difference]: Finished difference Result 724 states and 1951 transitions. [2022-03-15 15:55:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:09,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:09,498 INFO L225 Difference]: With dead ends: 724 [2022-03-15 15:55:09,498 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:55:09,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:55:09,499 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:09,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 131 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:55:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 656. [2022-03-15 15:55:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7740458015267175) internal successors, (1817), 655 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1817 transitions. [2022-03-15 15:55:09,505 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1817 transitions. Word has length 19 [2022-03-15 15:55:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:09,505 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1817 transitions. [2022-03-15 15:55:09,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1817 transitions. [2022-03-15 15:55:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:09,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:09,506 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:09,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:09,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:09,707 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash -11025657, now seen corresponding path program 457 times [2022-03-15 15:55:09,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:09,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014218871] [2022-03-15 15:55:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:09,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:09,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014218871] [2022-03-15 15:55:09,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014218871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:09,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541163348] [2022-03-15 15:55:09,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:09,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:09,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:09,876 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:09,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-03-15 15:55:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:10,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:10,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:10,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:10,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:10,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:10,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:10,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:10,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:10,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541163348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:10,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:10,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:10,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924413246] [2022-03-15 15:55:10,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:10,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:10,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:10,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:10,295 INFO L87 Difference]: Start difference. First operand 656 states and 1817 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:10,684 INFO L93 Difference]: Finished difference Result 691 states and 1867 transitions. [2022-03-15 15:55:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:10,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:10,685 INFO L225 Difference]: With dead ends: 691 [2022-03-15 15:55:10,685 INFO L226 Difference]: Without dead ends: 685 [2022-03-15 15:55:10,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:55:10,685 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:10,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 145 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-15 15:55:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 657. [2022-03-15 15:55:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.769817073170732) internal successors, (1817), 656 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1817 transitions. [2022-03-15 15:55:10,692 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1817 transitions. Word has length 19 [2022-03-15 15:55:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:10,692 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1817 transitions. [2022-03-15 15:55:10,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1817 transitions. [2022-03-15 15:55:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:10,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:10,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:10,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-03-15 15:55:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:10,908 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1024244505, now seen corresponding path program 458 times [2022-03-15 15:55:10,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:10,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476640252] [2022-03-15 15:55:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:10,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:11,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:11,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476640252] [2022-03-15 15:55:11,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476640252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:11,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105836771] [2022-03-15 15:55:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:11,016 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-03-15 15:55:11,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:11,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:11,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:11,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:11,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:11,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:11,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:11,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:11,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:11,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:11,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:11,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:11,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105836771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:11,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:11,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:11,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033324377] [2022-03-15 15:55:11,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:11,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:11,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:11,436 INFO L87 Difference]: Start difference. First operand 657 states and 1817 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:11,659 INFO L93 Difference]: Finished difference Result 704 states and 1902 transitions. [2022-03-15 15:55:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:55:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:11,660 INFO L225 Difference]: With dead ends: 704 [2022-03-15 15:55:11,660 INFO L226 Difference]: Without dead ends: 704 [2022-03-15 15:55:11,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:11,660 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:11,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 160 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-15 15:55:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 650. [2022-03-15 15:55:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.764252696456086) internal successors, (1794), 649 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1794 transitions. [2022-03-15 15:55:11,667 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1794 transitions. Word has length 19 [2022-03-15 15:55:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:11,667 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1794 transitions. [2022-03-15 15:55:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1794 transitions. [2022-03-15 15:55:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:11,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:11,667 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:11,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:11,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-03-15 15:55:11,883 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1029210141, now seen corresponding path program 459 times [2022-03-15 15:55:11,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:11,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662286278] [2022-03-15 15:55:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:12,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:12,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662286278] [2022-03-15 15:55:12,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662286278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:12,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730872500] [2022-03-15 15:55:12,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:12,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:12,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:12,026 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:12,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-03-15 15:55:12,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:55:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:12,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:12,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:12,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:12,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:12,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:12,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:12,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:12,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:12,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:12,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730872500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:12,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:12,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:12,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861310095] [2022-03-15 15:55:12,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:12,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:12,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:12,406 INFO L87 Difference]: Start difference. First operand 650 states and 1794 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:12,657 INFO L93 Difference]: Finished difference Result 681 states and 1838 transitions. [2022-03-15 15:55:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:12,658 INFO L225 Difference]: With dead ends: 681 [2022-03-15 15:55:12,658 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 15:55:12,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:12,659 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:12,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 184 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 15:55:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 652. [2022-03-15 15:55:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.758832565284178) internal successors, (1796), 651 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1796 transitions. [2022-03-15 15:55:12,665 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1796 transitions. Word has length 19 [2022-03-15 15:55:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:12,665 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1796 transitions. [2022-03-15 15:55:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1796 transitions. [2022-03-15 15:55:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:12,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:12,666 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:12,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:12,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-03-15 15:55:12,869 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1484814299, now seen corresponding path program 460 times [2022-03-15 15:55:12,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:12,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404372316] [2022-03-15 15:55:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:12,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:12,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404372316] [2022-03-15 15:55:12,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404372316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:12,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447636200] [2022-03-15 15:55:12,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:12,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:12,970 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:12,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-03-15 15:55:12,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:12,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:13,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:13,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:13,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:13,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:13,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:13,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:13,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447636200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:13,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:13,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:13,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807853132] [2022-03-15 15:55:13,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:13,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:13,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:13,345 INFO L87 Difference]: Start difference. First operand 652 states and 1796 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:13,598 INFO L93 Difference]: Finished difference Result 744 states and 1976 transitions. [2022-03-15 15:55:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:55:13,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:13,599 INFO L225 Difference]: With dead ends: 744 [2022-03-15 15:55:13,599 INFO L226 Difference]: Without dead ends: 744 [2022-03-15 15:55:13,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:13,599 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:13,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 206 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-15 15:55:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 656. [2022-03-15 15:55:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.761832061068702) internal successors, (1809), 655 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1809 transitions. [2022-03-15 15:55:13,606 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1809 transitions. Word has length 19 [2022-03-15 15:55:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:13,606 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1809 transitions. [2022-03-15 15:55:13,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1809 transitions. [2022-03-15 15:55:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:13,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:13,607 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:13,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Ended with exit code 0 [2022-03-15 15:55:13,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-03-15 15:55:13,822 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1924354717, now seen corresponding path program 461 times [2022-03-15 15:55:13,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:13,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453649537] [2022-03-15 15:55:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:13,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453649537] [2022-03-15 15:55:13,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453649537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:13,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032601701] [2022-03-15 15:55:13,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:13,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:13,929 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:13,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-03-15 15:55:13,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:13,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:13,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:14,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:14,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:14,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:14,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:55:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:14,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:14,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:14,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:14,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032601701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:14,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:14,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:14,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128418379] [2022-03-15 15:55:14,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:14,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:14,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:14,312 INFO L87 Difference]: Start difference. First operand 656 states and 1809 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:14,911 INFO L93 Difference]: Finished difference Result 779 states and 2055 transitions. [2022-03-15 15:55:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:14,913 INFO L225 Difference]: With dead ends: 779 [2022-03-15 15:55:14,913 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:55:14,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:55:14,913 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:14,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 172 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:55:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 653. [2022-03-15 15:55:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7592024539877302) internal successors, (1799), 652 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1799 transitions. [2022-03-15 15:55:14,920 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1799 transitions. Word has length 19 [2022-03-15 15:55:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:14,920 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1799 transitions. [2022-03-15 15:55:14,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1799 transitions. [2022-03-15 15:55:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:14,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:14,920 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:14,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-03-15 15:55:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-03-15 15:55:15,127 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash -182429403, now seen corresponding path program 462 times [2022-03-15 15:55:15,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:15,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076438448] [2022-03-15 15:55:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:15,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076438448] [2022-03-15 15:55:15,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076438448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:15,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033835182] [2022-03-15 15:55:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:15,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:15,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:15,252 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:15,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-03-15 15:55:15,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:55:15,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:15,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:15,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:15,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:15,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:15,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:15,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:15,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:15,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033835182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:15,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:15,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:15,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462078067] [2022-03-15 15:55:15,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:15,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:15,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:15,633 INFO L87 Difference]: Start difference. First operand 653 states and 1799 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:16,248 INFO L93 Difference]: Finished difference Result 807 states and 2107 transitions. [2022-03-15 15:55:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:55:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:16,249 INFO L225 Difference]: With dead ends: 807 [2022-03-15 15:55:16,249 INFO L226 Difference]: Without dead ends: 807 [2022-03-15 15:55:16,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=1825, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:55:16,250 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:16,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 130 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-15 15:55:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 653. [2022-03-15 15:55:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7592024539877302) internal successors, (1799), 652 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1799 transitions. [2022-03-15 15:55:16,256 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1799 transitions. Word has length 19 [2022-03-15 15:55:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:16,256 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1799 transitions. [2022-03-15 15:55:16,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1799 transitions. [2022-03-15 15:55:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:16,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:16,257 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:16,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:16,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2022-03-15 15:55:16,471 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1966367133, now seen corresponding path program 463 times [2022-03-15 15:55:16,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:16,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123819092] [2022-03-15 15:55:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:16,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123819092] [2022-03-15 15:55:16,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123819092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:16,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86319390] [2022-03-15 15:55:16,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:16,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:16,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:16,544 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:16,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-03-15 15:55:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:16,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:16,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:16,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:16,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:16,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:16,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:16,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:16,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86319390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:16,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:16,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:16,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687484593] [2022-03-15 15:55:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:16,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:16,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:16,828 INFO L87 Difference]: Start difference. First operand 653 states and 1799 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,799 INFO L93 Difference]: Finished difference Result 801 states and 2078 transitions. [2022-03-15 15:55:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:55:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,800 INFO L225 Difference]: With dead ends: 801 [2022-03-15 15:55:17,800 INFO L226 Difference]: Without dead ends: 801 [2022-03-15 15:55:17,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=365, Invalid=2085, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:55:17,801 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 185 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-03-15 15:55:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 654. [2022-03-15 15:55:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.761102603369066) internal successors, (1803), 653 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1803 transitions. [2022-03-15 15:55:17,807 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1803 transitions. Word has length 19 [2022-03-15 15:55:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,807 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1803 transitions. [2022-03-15 15:55:17,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1803 transitions. [2022-03-15 15:55:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:17,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,808 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:18,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-03-15 15:55:18,023 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash -968483423, now seen corresponding path program 464 times [2022-03-15 15:55:18,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:18,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001116059] [2022-03-15 15:55:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:18,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:18,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:18,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001116059] [2022-03-15 15:55:18,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001116059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:18,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350216051] [2022-03-15 15:55:18,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:18,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:18,130 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:18,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-03-15 15:55:18,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:18,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:18,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:18,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:18,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:18,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:18,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:18,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:18,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:18,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350216051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:18,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:18,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:55:18,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423879134] [2022-03-15 15:55:18,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:18,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:18,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:18,496 INFO L87 Difference]: Start difference. First operand 654 states and 1803 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:18,822 INFO L93 Difference]: Finished difference Result 747 states and 1965 transitions. [2022-03-15 15:55:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:18,823 INFO L225 Difference]: With dead ends: 747 [2022-03-15 15:55:18,823 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 15:55:18,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:18,823 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:18,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 189 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 15:55:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 648. [2022-03-15 15:55:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7619783616692426) internal successors, (1787), 647 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1787 transitions. [2022-03-15 15:55:18,830 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1787 transitions. Word has length 19 [2022-03-15 15:55:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:18,830 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1787 transitions. [2022-03-15 15:55:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1787 transitions. [2022-03-15 15:55:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:18,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:18,831 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:18,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:19,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2022-03-15 15:55:19,046 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 34625995, now seen corresponding path program 465 times [2022-03-15 15:55:19,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:19,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491078959] [2022-03-15 15:55:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:19,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:19,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491078959] [2022-03-15 15:55:19,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491078959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:19,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439526426] [2022-03-15 15:55:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:19,122 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:19,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-03-15 15:55:19,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:55:19,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:19,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:19,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:19,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:19,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:19,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:19,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:55:19,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:19,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:55:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:19,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439526426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:19,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:19,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:55:19,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485942514] [2022-03-15 15:55:19,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:19,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:19,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:19,379 INFO L87 Difference]: Start difference. First operand 648 states and 1787 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:19,586 INFO L93 Difference]: Finished difference Result 677 states and 1837 transitions. [2022-03-15 15:55:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:19,587 INFO L225 Difference]: With dead ends: 677 [2022-03-15 15:55:19,587 INFO L226 Difference]: Without dead ends: 662 [2022-03-15 15:55:19,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:19,588 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:19,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 116 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-15 15:55:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 648. [2022-03-15 15:55:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.758887171561051) internal successors, (1785), 647 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1785 transitions. [2022-03-15 15:55:19,594 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1785 transitions. Word has length 19 [2022-03-15 15:55:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:19,594 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1785 transitions. [2022-03-15 15:55:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1785 transitions. [2022-03-15 15:55:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:19,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:19,595 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:19,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:19,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:19,810 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1832211455, now seen corresponding path program 466 times [2022-03-15 15:55:19,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:19,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781958367] [2022-03-15 15:55:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:19,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:19,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781958367] [2022-03-15 15:55:19,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781958367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:19,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911509581] [2022-03-15 15:55:19,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:19,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:19,897 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:19,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-03-15 15:55:19,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:19,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:20,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:20,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:20,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:20,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:20,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:20,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:20,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:55:20,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:20,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:55:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:20,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911509581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:20,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:20,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:55:20,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882869508] [2022-03-15 15:55:20,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:20,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:55:20,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:55:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:20,184 INFO L87 Difference]: Start difference. First operand 648 states and 1785 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:20,529 INFO L93 Difference]: Finished difference Result 669 states and 1823 transitions. [2022-03-15 15:55:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:20,531 INFO L225 Difference]: With dead ends: 669 [2022-03-15 15:55:20,531 INFO L226 Difference]: Without dead ends: 660 [2022-03-15 15:55:20,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:20,531 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:20,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 79 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-03-15 15:55:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 649. [2022-03-15 15:55:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.756172839506173) internal successors, (1786), 648 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1786 transitions. [2022-03-15 15:55:20,538 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1786 transitions. Word has length 19 [2022-03-15 15:55:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:20,538 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1786 transitions. [2022-03-15 15:55:20,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1786 transitions. [2022-03-15 15:55:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:20,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:20,538 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:20,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:20,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:20,755 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2127674549, now seen corresponding path program 467 times [2022-03-15 15:55:20,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:20,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815448357] [2022-03-15 15:55:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:20,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:20,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815448357] [2022-03-15 15:55:20,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815448357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:20,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310720579] [2022-03-15 15:55:20,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:20,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:20,841 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:20,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-03-15 15:55:20,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:20,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:20,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:20,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:20,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:21,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:21,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:21,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:21,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:21,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310720579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:21,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:21,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:21,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324565071] [2022-03-15 15:55:21,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:21,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:21,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:21,106 INFO L87 Difference]: Start difference. First operand 649 states and 1786 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:21,568 INFO L93 Difference]: Finished difference Result 696 states and 1869 transitions. [2022-03-15 15:55:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:21,570 INFO L225 Difference]: With dead ends: 696 [2022-03-15 15:55:21,570 INFO L226 Difference]: Without dead ends: 690 [2022-03-15 15:55:21,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:55:21,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:21,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-03-15 15:55:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 652. [2022-03-15 15:55:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.758832565284178) internal successors, (1796), 651 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1796 transitions. [2022-03-15 15:55:21,579 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1796 transitions. Word has length 19 [2022-03-15 15:55:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:21,579 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1796 transitions. [2022-03-15 15:55:21,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1796 transitions. [2022-03-15 15:55:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:21,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:21,580 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:21,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:21,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2022-03-15 15:55:21,799 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash -295030577, now seen corresponding path program 468 times [2022-03-15 15:55:21,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:21,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701158133] [2022-03-15 15:55:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:21,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:21,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701158133] [2022-03-15 15:55:21,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701158133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:21,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819002651] [2022-03-15 15:55:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:21,878 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:21,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-03-15 15:55:21,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:55:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:22,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:22,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:22,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:22,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:22,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:22,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:22,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:22,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:22,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819002651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:22,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:22,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:22,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264466496] [2022-03-15 15:55:22,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:22,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:22,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:22,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:22,157 INFO L87 Difference]: Start difference. First operand 652 states and 1796 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:22,593 INFO L93 Difference]: Finished difference Result 746 states and 1990 transitions. [2022-03-15 15:55:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:22,594 INFO L225 Difference]: With dead ends: 746 [2022-03-15 15:55:22,594 INFO L226 Difference]: Without dead ends: 742 [2022-03-15 15:55:22,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:55:22,595 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:22,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 167 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-15 15:55:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 653. [2022-03-15 15:55:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.763803680981595) internal successors, (1802), 652 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1802 transitions. [2022-03-15 15:55:22,601 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1802 transitions. Word has length 19 [2022-03-15 15:55:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:22,601 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1802 transitions. [2022-03-15 15:55:22,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1802 transitions. [2022-03-15 15:55:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:22,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:22,602 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:22,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Ended with exit code 0 [2022-03-15 15:55:22,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:22,818 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2067548487, now seen corresponding path program 469 times [2022-03-15 15:55:22,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:22,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071629140] [2022-03-15 15:55:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:22,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:22,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071629140] [2022-03-15 15:55:22,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071629140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:22,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020431215] [2022-03-15 15:55:22,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:22,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:22,882 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:22,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-03-15 15:55:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:22,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:23,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:23,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:23,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:23,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:55:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:23,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:23,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:23,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:23,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:23,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020431215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:23,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:23,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:23,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890509181] [2022-03-15 15:55:23,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:23,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:23,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:23,269 INFO L87 Difference]: Start difference. First operand 653 states and 1802 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:23,653 INFO L93 Difference]: Finished difference Result 824 states and 2146 transitions. [2022-03-15 15:55:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:23,655 INFO L225 Difference]: With dead ends: 824 [2022-03-15 15:55:23,655 INFO L226 Difference]: Without dead ends: 824 [2022-03-15 15:55:23,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:55:23,655 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:23,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 192 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-15 15:55:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 663. [2022-03-15 15:55:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7673716012084593) internal successors, (1832), 662 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1832 transitions. [2022-03-15 15:55:23,662 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1832 transitions. Word has length 19 [2022-03-15 15:55:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:23,662 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1832 transitions. [2022-03-15 15:55:23,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1832 transitions. [2022-03-15 15:55:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:23,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:23,663 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:23,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-03-15 15:55:23,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-03-15 15:55:23,875 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 946413175, now seen corresponding path program 470 times [2022-03-15 15:55:23,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:23,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817751013] [2022-03-15 15:55:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:23,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:23,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817751013] [2022-03-15 15:55:23,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817751013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:23,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647292399] [2022-03-15 15:55:23,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:23,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:23,959 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:23,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-03-15 15:55:23,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:23,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:24,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:24,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:24,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:24,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:24,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:24,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-03-15 15:55:24,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:24,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:24,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647292399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:24,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:24,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:24,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986019997] [2022-03-15 15:55:24,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:24,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:24,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:24,270 INFO L87 Difference]: Start difference. First operand 663 states and 1832 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:24,627 INFO L93 Difference]: Finished difference Result 705 states and 1898 transitions. [2022-03-15 15:55:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:55:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:24,628 INFO L225 Difference]: With dead ends: 705 [2022-03-15 15:55:24,628 INFO L226 Difference]: Without dead ends: 693 [2022-03-15 15:55:24,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:24,628 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:24,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 122 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-03-15 15:55:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 663. [2022-03-15 15:55:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7643504531722054) internal successors, (1830), 662 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1830 transitions. [2022-03-15 15:55:24,635 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1830 transitions. Word has length 19 [2022-03-15 15:55:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:24,635 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1830 transitions. [2022-03-15 15:55:24,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1830 transitions. [2022-03-15 15:55:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:24,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:24,636 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:24,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:24,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:24,851 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2146023181, now seen corresponding path program 471 times [2022-03-15 15:55:24,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:24,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635448951] [2022-03-15 15:55:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:24,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:24,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635448951] [2022-03-15 15:55:24,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635448951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:24,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022793855] [2022-03-15 15:55:24,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:24,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:24,919 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:24,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-03-15 15:55:24,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:25,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:25,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:25,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:25,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:25,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:25,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:25,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:25,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:25,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022793855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:25,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:25,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:25,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332068675] [2022-03-15 15:55:25,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:25,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:25,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:25,176 INFO L87 Difference]: Start difference. First operand 663 states and 1830 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:25,749 INFO L93 Difference]: Finished difference Result 827 states and 2133 transitions. [2022-03-15 15:55:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:55:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:25,751 INFO L225 Difference]: With dead ends: 827 [2022-03-15 15:55:25,751 INFO L226 Difference]: Without dead ends: 824 [2022-03-15 15:55:25,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:55:25,751 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:25,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 153 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-15 15:55:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 652. [2022-03-15 15:55:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.749615975422427) internal successors, (1790), 651 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1790 transitions. [2022-03-15 15:55:25,758 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1790 transitions. Word has length 19 [2022-03-15 15:55:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:25,758 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1790 transitions. [2022-03-15 15:55:25,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1790 transitions. [2022-03-15 15:55:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:25,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:25,759 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:25,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-03-15 15:55:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-03-15 15:55:25,959 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash -785906441, now seen corresponding path program 472 times [2022-03-15 15:55:25,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:25,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877397707] [2022-03-15 15:55:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:26,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:26,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877397707] [2022-03-15 15:55:26,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877397707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:26,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968620500] [2022-03-15 15:55:26,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:26,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:26,073 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:26,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-03-15 15:55:26,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:26,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:26,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:26,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:26,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:26,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:26,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:26,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:26,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:26,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968620500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:26,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:26,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:26,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192684801] [2022-03-15 15:55:26,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:26,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:26,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:26,444 INFO L87 Difference]: Start difference. First operand 652 states and 1790 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:26,825 INFO L93 Difference]: Finished difference Result 701 states and 1883 transitions. [2022-03-15 15:55:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:26,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:26,826 INFO L225 Difference]: With dead ends: 701 [2022-03-15 15:55:26,826 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 15:55:26,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:26,826 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:26,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 130 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 15:55:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 650. [2022-03-15 15:55:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.74884437596302) internal successors, (1784), 649 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1784 transitions. [2022-03-15 15:55:26,833 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1784 transitions. Word has length 19 [2022-03-15 15:55:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:26,833 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1784 transitions. [2022-03-15 15:55:26,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1784 transitions. [2022-03-15 15:55:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:26,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:26,834 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:26,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-03-15 15:55:27,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-03-15 15:55:27,043 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1578809125, now seen corresponding path program 473 times [2022-03-15 15:55:27,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:27,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330786195] [2022-03-15 15:55:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:27,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330786195] [2022-03-15 15:55:27,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330786195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:27,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880179707] [2022-03-15 15:55:27,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:27,123 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:27,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-03-15 15:55:27,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:55:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:27,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:27,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:27,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:27,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:27,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:27,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:27,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:27,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880179707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:27,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:27,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:27,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299477528] [2022-03-15 15:55:27,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:27,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:27,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:27,385 INFO L87 Difference]: Start difference. First operand 650 states and 1784 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:27,568 INFO L93 Difference]: Finished difference Result 743 states and 1955 transitions. [2022-03-15 15:55:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:27,569 INFO L225 Difference]: With dead ends: 743 [2022-03-15 15:55:27,569 INFO L226 Difference]: Without dead ends: 743 [2022-03-15 15:55:27,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:27,569 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:27,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 173 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 562 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-03-15 15:55:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-03-15 15:55:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 654. [2022-03-15 15:55:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.753445635528331) internal successors, (1798), 653 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1798 transitions. [2022-03-15 15:55:27,576 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1798 transitions. Word has length 19 [2022-03-15 15:55:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:27,576 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1798 transitions. [2022-03-15 15:55:27,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1798 transitions. [2022-03-15 15:55:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:27,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:27,577 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:27,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:27,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:27,792 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1356041431, now seen corresponding path program 474 times [2022-03-15 15:55:27,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:27,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942134494] [2022-03-15 15:55:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:27,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942134494] [2022-03-15 15:55:27,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942134494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:27,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693595644] [2022-03-15 15:55:27,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:27,894 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:27,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-03-15 15:55:27,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:55:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:27,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:28,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:28,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:28,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:28,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:28,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:28,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:28,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693595644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:28,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:28,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:28,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168265263] [2022-03-15 15:55:28,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:28,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:28,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:28,149 INFO L87 Difference]: Start difference. First operand 654 states and 1798 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:28,384 INFO L93 Difference]: Finished difference Result 759 states and 2004 transitions. [2022-03-15 15:55:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:55:28,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:28,386 INFO L225 Difference]: With dead ends: 759 [2022-03-15 15:55:28,386 INFO L226 Difference]: Without dead ends: 759 [2022-03-15 15:55:28,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:28,386 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:28,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 201 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 606 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-03-15 15:55:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-15 15:55:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 656. [2022-03-15 15:55:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7572519083969467) internal successors, (1806), 655 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1806 transitions. [2022-03-15 15:55:28,393 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1806 transitions. Word has length 19 [2022-03-15 15:55:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:28,393 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1806 transitions. [2022-03-15 15:55:28,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1806 transitions. [2022-03-15 15:55:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:28,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:28,394 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:28,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-03-15 15:55:28,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2022-03-15 15:55:28,609 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash -743894025, now seen corresponding path program 475 times [2022-03-15 15:55:28,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:28,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789466863] [2022-03-15 15:55:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:28,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789466863] [2022-03-15 15:55:28,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789466863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:28,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967730255] [2022-03-15 15:55:28,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:28,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:28,703 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:28,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-03-15 15:55:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:28,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:28,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:28,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:28,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:55:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:28,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:28,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:28,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:28,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967730255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:28,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:28,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:28,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451724964] [2022-03-15 15:55:28,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:28,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:28,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:28,958 INFO L87 Difference]: Start difference. First operand 656 states and 1806 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:29,056 INFO L93 Difference]: Finished difference Result 698 states and 1886 transitions. [2022-03-15 15:55:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:29,058 INFO L225 Difference]: With dead ends: 698 [2022-03-15 15:55:29,058 INFO L226 Difference]: Without dead ends: 698 [2022-03-15 15:55:29,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:29,058 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:29,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 86 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 383 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-03-15 15:55:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-15 15:55:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 654. [2022-03-15 15:55:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.753445635528331) internal successors, (1798), 653 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1798 transitions. [2022-03-15 15:55:29,065 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1798 transitions. Word has length 19 [2022-03-15 15:55:29,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:29,065 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1798 transitions. [2022-03-15 15:55:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1798 transitions. [2022-03-15 15:55:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:29,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:29,066 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:29,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-03-15 15:55:29,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:29,267 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:29,267 INFO L85 PathProgramCache]: Analyzing trace with hash 472124517, now seen corresponding path program 476 times [2022-03-15 15:55:29,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:29,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298028896] [2022-03-15 15:55:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:29,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:29,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:29,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298028896] [2022-03-15 15:55:29,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298028896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:29,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967093080] [2022-03-15 15:55:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:29,376 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:29,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-03-15 15:55:29,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:29,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:29,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:55:29,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:29,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:55:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:29,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:29,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:29,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:55:29,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:29,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:55:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:29,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967093080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:29,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:29,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:55:29,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769232832] [2022-03-15 15:55:29,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:29,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:55:29,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:55:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:29,721 INFO L87 Difference]: Start difference. First operand 654 states and 1798 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:29,795 INFO L93 Difference]: Finished difference Result 671 states and 1828 transitions. [2022-03-15 15:55:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:55:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:29,796 INFO L225 Difference]: With dead ends: 671 [2022-03-15 15:55:29,796 INFO L226 Difference]: Without dead ends: 665 [2022-03-15 15:55:29,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:29,796 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:29,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-15 15:55:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-15 15:55:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 653. [2022-03-15 15:55:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.75) internal successors, (1793), 652 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1793 transitions. [2022-03-15 15:55:29,802 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1793 transitions. Word has length 19 [2022-03-15 15:55:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:29,802 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1793 transitions. [2022-03-15 15:55:29,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1793 transitions. [2022-03-15 15:55:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:29,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:29,803 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:29,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-03-15 15:55:30,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,007 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1756549499, now seen corresponding path program 477 times [2022-03-15 15:55:30,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:30,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539966293] [2022-03-15 15:55:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:30,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539966293] [2022-03-15 15:55:30,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539966293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:30,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897950704] [2022-03-15 15:55:30,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:30,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:30,104 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:30,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-03-15 15:55:30,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:30,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:30,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:30,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:30,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:55:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:30,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:30,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:30,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:30,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897950704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:30,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:30,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:30,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947975756] [2022-03-15 15:55:30,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:30,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:30,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:30,409 INFO L87 Difference]: Start difference. First operand 653 states and 1793 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:30,667 INFO L93 Difference]: Finished difference Result 793 states and 2077 transitions. [2022-03-15 15:55:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:30,668 INFO L225 Difference]: With dead ends: 793 [2022-03-15 15:55:30,668 INFO L226 Difference]: Without dead ends: 793 [2022-03-15 15:55:30,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:30,669 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:30,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-15 15:55:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 656. [2022-03-15 15:55:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7526717557251907) internal successors, (1803), 655 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1803 transitions. [2022-03-15 15:55:30,675 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1803 transitions. Word has length 19 [2022-03-15 15:55:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:30,675 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1803 transitions. [2022-03-15 15:55:30,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1803 transitions. [2022-03-15 15:55:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:30,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:30,676 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:30,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-03-15 15:55:30,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,877 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash -389621261, now seen corresponding path program 478 times [2022-03-15 15:55:30,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:30,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440608987] [2022-03-15 15:55:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:30,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440608987] [2022-03-15 15:55:30,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440608987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:30,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920090195] [2022-03-15 15:55:30,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:30,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:30,979 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:30,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-03-15 15:55:31,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:31,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:31,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:31,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:31,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:31,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:31,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:31,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:31,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:31,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:31,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920090195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:31,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:31,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:31,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776432524] [2022-03-15 15:55:31,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:31,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:31,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:31,275 INFO L87 Difference]: Start difference. First operand 656 states and 1803 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:31,604 INFO L93 Difference]: Finished difference Result 838 states and 2161 transitions. [2022-03-15 15:55:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:55:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:31,605 INFO L225 Difference]: With dead ends: 838 [2022-03-15 15:55:31,605 INFO L226 Difference]: Without dead ends: 838 [2022-03-15 15:55:31,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:31,606 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:31,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 180 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-15 15:55:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 657. [2022-03-15 15:55:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.754573170731707) internal successors, (1807), 656 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1807 transitions. [2022-03-15 15:55:31,613 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1807 transitions. Word has length 19 [2022-03-15 15:55:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:31,613 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1807 transitions. [2022-03-15 15:55:31,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1807 transitions. [2022-03-15 15:55:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:31,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:31,613 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:31,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:31,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:31,829 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:31,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1257070909, now seen corresponding path program 479 times [2022-03-15 15:55:31,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:31,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402040816] [2022-03-15 15:55:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:31,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:31,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:31,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402040816] [2022-03-15 15:55:31,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402040816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:31,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744958812] [2022-03-15 15:55:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:31,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:31,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:31,930 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:31,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-03-15 15:55:31,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:55:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:32,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:32,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:32,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:32,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:32,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:32,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:32,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:32,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:32,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744958812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:32,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:32,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:55:32,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19788707] [2022-03-15 15:55:32,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:32,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:55:32,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:55:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:32,237 INFO L87 Difference]: Start difference. First operand 657 states and 1807 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:32,765 INFO L93 Difference]: Finished difference Result 740 states and 1963 transitions. [2022-03-15 15:55:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:55:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:32,766 INFO L225 Difference]: With dead ends: 740 [2022-03-15 15:55:32,766 INFO L226 Difference]: Without dead ends: 734 [2022-03-15 15:55:32,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:55:32,767 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:32,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 143 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-15 15:55:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 659. [2022-03-15 15:55:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.75531914893617) internal successors, (1813), 658 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1813 transitions. [2022-03-15 15:55:32,773 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1813 transitions. Word has length 19 [2022-03-15 15:55:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:32,773 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1813 transitions. [2022-03-15 15:55:32,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1813 transitions. [2022-03-15 15:55:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:32,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:32,774 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:32,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Ended with exit code 0 [2022-03-15 15:55:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:32,990 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 970495479, now seen corresponding path program 480 times [2022-03-15 15:55:32,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:32,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818376446] [2022-03-15 15:55:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:33,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:33,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818376446] [2022-03-15 15:55:33,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818376446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:33,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097367928] [2022-03-15 15:55:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:33,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:33,106 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:33,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-03-15 15:55:33,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:55:33,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:33,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:33,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:33,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:33,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:33,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:33,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:33,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:33,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:33,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:33,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097367928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:33,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:33,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:33,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109044378] [2022-03-15 15:55:33,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:33,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:33,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:33,489 INFO L87 Difference]: Start difference. First operand 659 states and 1813 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:33,858 INFO L93 Difference]: Finished difference Result 722 states and 1928 transitions. [2022-03-15 15:55:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:33,859 INFO L225 Difference]: With dead ends: 722 [2022-03-15 15:55:33,859 INFO L226 Difference]: Without dead ends: 722 [2022-03-15 15:55:33,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:33,860 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:33,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 141 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-15 15:55:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 657. [2022-03-15 15:55:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7515243902439024) internal successors, (1805), 656 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1805 transitions. [2022-03-15 15:55:33,867 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1805 transitions. Word has length 19 [2022-03-15 15:55:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:33,867 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1805 transitions. [2022-03-15 15:55:33,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1805 transitions. [2022-03-15 15:55:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:33,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:33,867 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:33,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:34,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-03-15 15:55:34,083 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 575573063, now seen corresponding path program 481 times [2022-03-15 15:55:34,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:34,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513746692] [2022-03-15 15:55:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:34,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513746692] [2022-03-15 15:55:34,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513746692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:34,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451352085] [2022-03-15 15:55:34,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:34,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:34,176 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:34,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-03-15 15:55:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:34,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:34,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:34,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:34,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:34,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:34,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:34,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:34,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:34,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:34,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451352085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:34,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:34,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:55:34,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995129981] [2022-03-15 15:55:34,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:34,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:55:34,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:34,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:55:34,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:34,430 INFO L87 Difference]: Start difference. First operand 657 states and 1805 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:34,657 INFO L93 Difference]: Finished difference Result 779 states and 2048 transitions. [2022-03-15 15:55:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:55:34,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:34,658 INFO L225 Difference]: With dead ends: 779 [2022-03-15 15:55:34,658 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 15:55:34,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:34,659 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:34,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 141 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 15:55:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 655. [2022-03-15 15:55:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.7507645259938838) internal successors, (1799), 654 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1799 transitions. [2022-03-15 15:55:34,666 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1799 transitions. Word has length 19 [2022-03-15 15:55:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:34,666 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1799 transitions. [2022-03-15 15:55:34,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1799 transitions. [2022-03-15 15:55:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:34,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:34,666 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:34,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-03-15 15:55:34,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-03-15 15:55:34,870 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:34,870 INFO L85 PathProgramCache]: Analyzing trace with hash 400360489, now seen corresponding path program 482 times [2022-03-15 15:55:34,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:34,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393464751] [2022-03-15 15:55:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:34,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393464751] [2022-03-15 15:55:34,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393464751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:34,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392992746] [2022-03-15 15:55:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:34,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:34,972 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:34,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-03-15 15:55:35,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:35,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:35,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:35,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:35,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:35,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:35,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:35,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:35,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:35,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:35,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392992746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:35,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:35,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:35,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326043559] [2022-03-15 15:55:35,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:35,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:35,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:35,245 INFO L87 Difference]: Start difference. First operand 655 states and 1799 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:35,581 INFO L93 Difference]: Finished difference Result 792 states and 2071 transitions. [2022-03-15 15:55:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:55:35,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:35,582 INFO L225 Difference]: With dead ends: 792 [2022-03-15 15:55:35,582 INFO L226 Difference]: Without dead ends: 792 [2022-03-15 15:55:35,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:55:35,583 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:35,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 603 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-03-15 15:55:35,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-15 15:55:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 660. [2022-03-15 15:55:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.755690440060698) internal successors, (1816), 659 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1816 transitions. [2022-03-15 15:55:35,590 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1816 transitions. Word has length 19 [2022-03-15 15:55:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:35,590 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1816 transitions. [2022-03-15 15:55:35,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1816 transitions. [2022-03-15 15:55:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:35,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:35,591 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:35,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Ended with exit code 0 [2022-03-15 15:55:35,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-03-15 15:55:35,808 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1012507895, now seen corresponding path program 483 times [2022-03-15 15:55:35,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:35,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212822431] [2022-03-15 15:55:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:35,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:35,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:35,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212822431] [2022-03-15 15:55:35,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212822431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:35,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249456195] [2022-03-15 15:55:35,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:35,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:35,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:35,905 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:35,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-03-15 15:55:35,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:35,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:36,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:36,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:36,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:36,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:36,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:36,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249456195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:36,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:36,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:36,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681326899] [2022-03-15 15:55:36,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:36,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:36,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:36,156 INFO L87 Difference]: Start difference. First operand 660 states and 1816 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:36,303 INFO L93 Difference]: Finished difference Result 711 states and 1919 transitions. [2022-03-15 15:55:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:55:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:36,304 INFO L225 Difference]: With dead ends: 711 [2022-03-15 15:55:36,304 INFO L226 Difference]: Without dead ends: 711 [2022-03-15 15:55:36,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:36,305 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:36,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 345 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-03-15 15:55:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-15 15:55:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 657. [2022-03-15 15:55:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.75) internal successors, (1804), 656 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1804 transitions. [2022-03-15 15:55:36,312 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1804 transitions. Word has length 19 [2022-03-15 15:55:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:36,312 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1804 transitions. [2022-03-15 15:55:36,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1804 transitions. [2022-03-15 15:55:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:36,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:36,312 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:36,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:36,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-03-15 15:55:36,523 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1977702219, now seen corresponding path program 484 times [2022-03-15 15:55:36,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:36,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878367004] [2022-03-15 15:55:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:36,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878367004] [2022-03-15 15:55:36,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878367004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:36,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298211465] [2022-03-15 15:55:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:36,594 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:36,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-03-15 15:55:36,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:36,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:36,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:36,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:36,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:36,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:36,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:36,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298211465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:36,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:36,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:36,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695029485] [2022-03-15 15:55:36,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:36,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:36,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:36,850 INFO L87 Difference]: Start difference. First operand 657 states and 1804 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:37,023 INFO L93 Difference]: Finished difference Result 726 states and 1937 transitions. [2022-03-15 15:55:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:55:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:37,024 INFO L225 Difference]: With dead ends: 726 [2022-03-15 15:55:37,024 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 15:55:37,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:37,024 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:37,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 118 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 436 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2022-03-15 15:55:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 15:55:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 654. [2022-03-15 15:55:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.74885145482389) internal successors, (1795), 653 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1795 transitions. [2022-03-15 15:55:37,031 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1795 transitions. Word has length 19 [2022-03-15 15:55:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:37,031 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1795 transitions. [2022-03-15 15:55:37,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1795 transitions. [2022-03-15 15:55:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:37,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:37,032 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:37,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-03-15 15:55:37,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2022-03-15 15:55:37,246 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash 912763635, now seen corresponding path program 485 times [2022-03-15 15:55:37,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:37,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857899856] [2022-03-15 15:55:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:37,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:37,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:37,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857899856] [2022-03-15 15:55:37,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857899856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:37,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427786139] [2022-03-15 15:55:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:37,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:37,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:37,373 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:37,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-03-15 15:55:37,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:37,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:37,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:37,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:37,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:37,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:37,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:37,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:37,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427786139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:37,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:37,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:37,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600347831] [2022-03-15 15:55:37,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:37,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:37,698 INFO L87 Difference]: Start difference. First operand 654 states and 1795 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:37,969 INFO L93 Difference]: Finished difference Result 732 states and 1932 transitions. [2022-03-15 15:55:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:37,970 INFO L225 Difference]: With dead ends: 732 [2022-03-15 15:55:37,970 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 15:55:37,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:37,970 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:37,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 130 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 399 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 15:55:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 15:55:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 648. [2022-03-15 15:55:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7480680061823803) internal successors, (1778), 647 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1778 transitions. [2022-03-15 15:55:37,977 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1778 transitions. Word has length 19 [2022-03-15 15:55:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:37,978 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1778 transitions. [2022-03-15 15:55:37,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1778 transitions. [2022-03-15 15:55:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:37,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:37,978 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:37,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-03-15 15:55:38,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:38,191 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 45313987, now seen corresponding path program 486 times [2022-03-15 15:55:38,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:38,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135518024] [2022-03-15 15:55:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:38,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:38,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135518024] [2022-03-15 15:55:38,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135518024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:38,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60056012] [2022-03-15 15:55:38,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:38,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:38,299 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:38,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-03-15 15:55:38,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:55:38,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:38,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:38,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:38,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:38,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:38,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:38,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:38,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:38,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60056012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:38,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:38,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:38,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806914103] [2022-03-15 15:55:38,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:38,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:38,696 INFO L87 Difference]: Start difference. First operand 648 states and 1778 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:39,198 INFO L93 Difference]: Finished difference Result 753 states and 1984 transitions. [2022-03-15 15:55:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:39,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:39,200 INFO L225 Difference]: With dead ends: 753 [2022-03-15 15:55:39,200 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 15:55:39,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:55:39,200 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:39,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 107 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 455 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-03-15 15:55:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 15:55:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 652. [2022-03-15 15:55:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.7450076804915513) internal successors, (1787), 651 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1787 transitions. [2022-03-15 15:55:39,207 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1787 transitions. Word has length 19 [2022-03-15 15:55:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:39,208 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1787 transitions. [2022-03-15 15:55:39,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1787 transitions. [2022-03-15 15:55:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:39,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:39,208 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:39,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:39,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2022-03-15 15:55:39,419 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2022086921, now seen corresponding path program 487 times [2022-03-15 15:55:39,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:39,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292235415] [2022-03-15 15:55:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:39,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:39,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292235415] [2022-03-15 15:55:39,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292235415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:39,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286991103] [2022-03-15 15:55:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:39,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:39,489 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:39,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-03-15 15:55:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:39,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:39,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:39,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:39,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:39,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:39,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:39,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:39,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286991103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:39,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:39,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:39,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480115196] [2022-03-15 15:55:39,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:39,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:39,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:39,926 INFO L87 Difference]: Start difference. First operand 652 states and 1787 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:40,177 INFO L93 Difference]: Finished difference Result 740 states and 1958 transitions. [2022-03-15 15:55:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:40,178 INFO L225 Difference]: With dead ends: 740 [2022-03-15 15:55:40,178 INFO L226 Difference]: Without dead ends: 740 [2022-03-15 15:55:40,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:40,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:40,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 169 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 536 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-03-15 15:55:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-15 15:55:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 652. [2022-03-15 15:55:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.748079877112135) internal successors, (1789), 651 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1789 transitions. [2022-03-15 15:55:40,185 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1789 transitions. Word has length 19 [2022-03-15 15:55:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:40,185 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1789 transitions. [2022-03-15 15:55:40,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1789 transitions. [2022-03-15 15:55:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:40,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:40,186 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:40,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:40,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:40,388 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 126709615, now seen corresponding path program 488 times [2022-03-15 15:55:40,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:40,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595886720] [2022-03-15 15:55:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:40,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:40,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595886720] [2022-03-15 15:55:40,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595886720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:40,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819735368] [2022-03-15 15:55:40,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:40,456 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:40,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-03-15 15:55:40,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:40,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:40,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:40,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:40,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:40,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:40,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:40,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:40,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:40,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:40,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:40,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:40,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819735368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:40,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:40,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:40,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37581831] [2022-03-15 15:55:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:40,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:40,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:40,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:40,800 INFO L87 Difference]: Start difference. First operand 652 states and 1789 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:41,176 INFO L93 Difference]: Finished difference Result 732 states and 1952 transitions. [2022-03-15 15:55:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:41,179 INFO L225 Difference]: With dead ends: 732 [2022-03-15 15:55:41,179 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 15:55:41,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:55:41,179 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:41,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 77 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 326 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-15 15:55:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 15:55:41,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 650. [2022-03-15 15:55:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.74884437596302) internal successors, (1784), 649 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1784 transitions. [2022-03-15 15:55:41,185 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1784 transitions. Word has length 19 [2022-03-15 15:55:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:41,185 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1784 transitions. [2022-03-15 15:55:41,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1784 transitions. [2022-03-15 15:55:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:41,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:41,186 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:41,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-03-15 15:55:41,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:41,387 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1980074505, now seen corresponding path program 489 times [2022-03-15 15:55:41,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:41,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478035533] [2022-03-15 15:55:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:41,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:41,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478035533] [2022-03-15 15:55:41,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478035533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:41,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012718868] [2022-03-15 15:55:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:41,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:41,486 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:41,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-03-15 15:55:41,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:41,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:41,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:41,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:41,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:41,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:41,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:55:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:41,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:41,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:41,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:41,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:41,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:41,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012718868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:41,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:41,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:41,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57392142] [2022-03-15 15:55:41,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:41,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:41,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:41,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:41,855 INFO L87 Difference]: Start difference. First operand 650 states and 1784 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:42,017 INFO L93 Difference]: Finished difference Result 699 states and 1882 transitions. [2022-03-15 15:55:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:42,018 INFO L225 Difference]: With dead ends: 699 [2022-03-15 15:55:42,018 INFO L226 Difference]: Without dead ends: 699 [2022-03-15 15:55:42,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:42,018 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:42,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 124 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-03-15 15:55:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-15 15:55:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 648. [2022-03-15 15:55:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7465224111282844) internal successors, (1777), 647 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1777 transitions. [2022-03-15 15:55:42,025 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1777 transitions. Word has length 19 [2022-03-15 15:55:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:42,025 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1777 transitions. [2022-03-15 15:55:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1777 transitions. [2022-03-15 15:55:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:42,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:42,025 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:42,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:42,235 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1550109983, now seen corresponding path program 490 times [2022-03-15 15:55:42,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:42,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62267835] [2022-03-15 15:55:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:42,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:42,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62267835] [2022-03-15 15:55:42,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62267835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:42,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529258187] [2022-03-15 15:55:42,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:42,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:42,337 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:42,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-03-15 15:55:42,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:42,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:42,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:42,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:42,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:42,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:55:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:42,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:42,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:42,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:42,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:42,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:42,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529258187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:42,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:42,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:42,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424129256] [2022-03-15 15:55:42,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:42,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:42,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:42,669 INFO L87 Difference]: Start difference. First operand 648 states and 1777 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:42,824 INFO L93 Difference]: Finished difference Result 708 states and 1888 transitions. [2022-03-15 15:55:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:42,825 INFO L225 Difference]: With dead ends: 708 [2022-03-15 15:55:42,825 INFO L226 Difference]: Without dead ends: 708 [2022-03-15 15:55:42,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:42,826 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:42,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 152 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 478 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-03-15 15:55:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-03-15 15:55:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 647. [2022-03-15 15:55:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.7461300309597525) internal successors, (1774), 646 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1774 transitions. [2022-03-15 15:55:42,832 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1774 transitions. Word has length 19 [2022-03-15 15:55:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:42,832 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1774 transitions. [2022-03-15 15:55:42,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1774 transitions. [2022-03-15 15:55:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:42,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:42,833 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:42,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-03-15 15:55:43,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:43,049 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1930473479, now seen corresponding path program 491 times [2022-03-15 15:55:43,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:43,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260245232] [2022-03-15 15:55:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:43,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:43,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260245232] [2022-03-15 15:55:43,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260245232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:43,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838912140] [2022-03-15 15:55:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:43,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:43,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:43,152 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:43,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-03-15 15:55:43,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:55:43,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:43,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:43,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:43,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:55:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:43,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:55:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:43,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:43,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:55:43,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:43,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:55:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838912140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:43,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:43,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:55:43,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020685826] [2022-03-15 15:55:43,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:43,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:43,525 INFO L87 Difference]: Start difference. First operand 647 states and 1774 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:43,653 INFO L93 Difference]: Finished difference Result 668 states and 1810 transitions. [2022-03-15 15:55:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:55:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:43,654 INFO L225 Difference]: With dead ends: 668 [2022-03-15 15:55:43,654 INFO L226 Difference]: Without dead ends: 658 [2022-03-15 15:55:43,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:43,655 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:43,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 110 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-15 15:55:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-15 15:55:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 646. [2022-03-15 15:55:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.744186046511628) internal successors, (1770), 645 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1770 transitions. [2022-03-15 15:55:43,661 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1770 transitions. Word has length 19 [2022-03-15 15:55:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:43,661 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1770 transitions. [2022-03-15 15:55:43,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1770 transitions. [2022-03-15 15:55:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:43,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:43,662 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:43,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-03-15 15:55:43,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-03-15 15:55:43,862 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1151703515, now seen corresponding path program 492 times [2022-03-15 15:55:43,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:43,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684537336] [2022-03-15 15:55:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:43,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684537336] [2022-03-15 15:55:43,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684537336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:43,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443900164] [2022-03-15 15:55:43,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:43,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:43,962 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:43,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-03-15 15:55:43,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:55:43,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:43,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:43,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:44,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:44,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:44,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:44,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:55:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:44,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:44,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:44,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:44,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443900164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:44,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:44,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:44,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507649450] [2022-03-15 15:55:44,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:44,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:44,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:44,268 INFO L87 Difference]: Start difference. First operand 646 states and 1770 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:44,589 INFO L93 Difference]: Finished difference Result 763 states and 2005 transitions. [2022-03-15 15:55:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:44,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:44,591 INFO L225 Difference]: With dead ends: 763 [2022-03-15 15:55:44,591 INFO L226 Difference]: Without dead ends: 763 [2022-03-15 15:55:44,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:44,591 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:44,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 233 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-03-15 15:55:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 652. [2022-03-15 15:55:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.748079877112135) internal successors, (1789), 651 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1789 transitions. [2022-03-15 15:55:44,598 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1789 transitions. Word has length 19 [2022-03-15 15:55:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:44,598 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1789 transitions. [2022-03-15 15:55:44,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1789 transitions. [2022-03-15 15:55:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:44,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:44,599 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:44,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-03-15 15:55:44,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-03-15 15:55:44,807 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1036479661, now seen corresponding path program 493 times [2022-03-15 15:55:44,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:44,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461192223] [2022-03-15 15:55:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:44,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:44,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461192223] [2022-03-15 15:55:44,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461192223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:44,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656736487] [2022-03-15 15:55:44,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:44,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:44,910 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:44,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-03-15 15:55:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:44,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:44,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:45,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:45,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:45,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:55:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:45,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:45,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:45,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:45,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:45,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:45,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656736487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:45,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:45,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:45,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929424763] [2022-03-15 15:55:45,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:45,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:45,173 INFO L87 Difference]: Start difference. First operand 652 states and 1789 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:45,552 INFO L93 Difference]: Finished difference Result 821 states and 2131 transitions. [2022-03-15 15:55:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:45,554 INFO L225 Difference]: With dead ends: 821 [2022-03-15 15:55:45,554 INFO L226 Difference]: Without dead ends: 821 [2022-03-15 15:55:45,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:55:45,554 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:45,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 133 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-03-15 15:55:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 651. [2022-03-15 15:55:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.746153846153846) internal successors, (1785), 650 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1785 transitions. [2022-03-15 15:55:45,561 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1785 transitions. Word has length 19 [2022-03-15 15:55:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:45,561 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1785 transitions. [2022-03-15 15:55:45,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1785 transitions. [2022-03-15 15:55:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:45,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:45,562 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:45,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-03-15 15:55:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-03-15 15:55:45,777 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1109691099, now seen corresponding path program 494 times [2022-03-15 15:55:45,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:45,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689200643] [2022-03-15 15:55:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:45,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:45,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689200643] [2022-03-15 15:55:45,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689200643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:45,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263783303] [2022-03-15 15:55:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:45,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:45,879 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:45,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-03-15 15:55:45,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:45,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:46,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:46,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:46,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:46,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:46,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:46,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:46,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:46,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:46,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263783303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:46,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:46,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:46,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202362725] [2022-03-15 15:55:46,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:46,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:46,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:46,208 INFO L87 Difference]: Start difference. First operand 651 states and 1785 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:46,963 INFO L93 Difference]: Finished difference Result 894 states and 2268 transitions. [2022-03-15 15:55:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:55:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:46,964 INFO L225 Difference]: With dead ends: 894 [2022-03-15 15:55:46,964 INFO L226 Difference]: Without dead ends: 894 [2022-03-15 15:55:46,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=1949, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:55:46,965 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:46,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 226 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-03-15 15:55:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 652. [2022-03-15 15:55:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.748079877112135) internal successors, (1789), 651 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1789 transitions. [2022-03-15 15:55:46,972 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1789 transitions. Word has length 19 [2022-03-15 15:55:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:46,972 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1789 transitions. [2022-03-15 15:55:46,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1789 transitions. [2022-03-15 15:55:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:46,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:46,973 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:46,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:47,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-03-15 15:55:47,188 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash -439702153, now seen corresponding path program 495 times [2022-03-15 15:55:47,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:47,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671056195] [2022-03-15 15:55:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:47,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:47,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671056195] [2022-03-15 15:55:47,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671056195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:47,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377209696] [2022-03-15 15:55:47,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:47,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:47,279 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:47,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-03-15 15:55:47,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:47,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:47,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:47,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:55:47,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:47,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:55:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:47,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:47,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:47,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:55:47,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:47,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:55:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:47,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377209696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:47,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:47,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:55:47,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047643543] [2022-03-15 15:55:47,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:47,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:47,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:47,575 INFO L87 Difference]: Start difference. First operand 652 states and 1789 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:47,925 INFO L93 Difference]: Finished difference Result 699 states and 1859 transitions. [2022-03-15 15:55:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:55:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:47,927 INFO L225 Difference]: With dead ends: 699 [2022-03-15 15:55:47,927 INFO L226 Difference]: Without dead ends: 687 [2022-03-15 15:55:47,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:47,927 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:47,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 158 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-15 15:55:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 652. [2022-03-15 15:55:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.7450076804915513) internal successors, (1787), 651 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1787 transitions. [2022-03-15 15:55:47,934 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1787 transitions. Word has length 19 [2022-03-15 15:55:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:47,934 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1787 transitions. [2022-03-15 15:55:47,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1787 transitions. [2022-03-15 15:55:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:47,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:47,934 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:47,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2022-03-15 15:55:48,150 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2122945527, now seen corresponding path program 496 times [2022-03-15 15:55:48,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:48,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419847315] [2022-03-15 15:55:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:48,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:48,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419847315] [2022-03-15 15:55:48,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419847315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:48,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995753958] [2022-03-15 15:55:48,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:48,246 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:48,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-03-15 15:55:48,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:48,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:48,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:48,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:48,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:48,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:48,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:48,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:48,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:48,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:48,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:48,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995753958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:48,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:48,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:48,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262662109] [2022-03-15 15:55:48,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:48,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:48,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:48,599 INFO L87 Difference]: Start difference. First operand 652 states and 1787 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:48,991 INFO L93 Difference]: Finished difference Result 726 states and 1925 transitions. [2022-03-15 15:55:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:55:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:48,992 INFO L225 Difference]: With dead ends: 726 [2022-03-15 15:55:48,992 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 15:55:48,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:48,993 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:48,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 147 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 15:55:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 650. [2022-03-15 15:55:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.741140215716487) internal successors, (1779), 649 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1779 transitions. [2022-03-15 15:55:48,999 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1779 transitions. Word has length 19 [2022-03-15 15:55:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:48,999 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1779 transitions. [2022-03-15 15:55:48,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1779 transitions. [2022-03-15 15:55:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:49,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:49,000 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:49,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:49,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-03-15 15:55:49,200 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1728023111, now seen corresponding path program 497 times [2022-03-15 15:55:49,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:49,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071230027] [2022-03-15 15:55:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:49,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:49,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071230027] [2022-03-15 15:55:49,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071230027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:49,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253281925] [2022-03-15 15:55:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:49,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:49,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:49,299 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:49,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-03-15 15:55:49,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:49,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:49,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:49,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:49,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:49,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:49,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:49,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:49,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:49,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253281925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:49,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:49,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:55:49,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789774554] [2022-03-15 15:55:49,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:49,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:55:49,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:55:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:49,631 INFO L87 Difference]: Start difference. First operand 650 states and 1779 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:49,944 INFO L93 Difference]: Finished difference Result 771 states and 2031 transitions. [2022-03-15 15:55:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:49,945 INFO L225 Difference]: With dead ends: 771 [2022-03-15 15:55:49,945 INFO L226 Difference]: Without dead ends: 767 [2022-03-15 15:55:49,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:55:49,946 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:49,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-15 15:55:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 650. [2022-03-15 15:55:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.7442218798151004) internal successors, (1781), 649 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1781 transitions. [2022-03-15 15:55:49,952 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1781 transitions. Word has length 19 [2022-03-15 15:55:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:49,952 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1781 transitions. [2022-03-15 15:55:49,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1781 transitions. [2022-03-15 15:55:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:49,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:49,953 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:49,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-03-15 15:55:50,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:50,169 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2130009353, now seen corresponding path program 498 times [2022-03-15 15:55:50,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:50,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816840813] [2022-03-15 15:55:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:50,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:50,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816840813] [2022-03-15 15:55:50,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816840813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:50,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085388852] [2022-03-15 15:55:50,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:50,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:50,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:50,270 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:50,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-03-15 15:55:50,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:55:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:50,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:50,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:50,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:50,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:50,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:50,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:50,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:50,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:50,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085388852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:50,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:50,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:50,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216206608] [2022-03-15 15:55:50,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:50,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:50,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:50,654 INFO L87 Difference]: Start difference. First operand 650 states and 1781 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:50,813 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2022-03-15 15:55:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:55:50,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:50,815 INFO L225 Difference]: With dead ends: 731 [2022-03-15 15:55:50,815 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 15:55:50,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:50,815 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:50,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 109 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 398 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-03-15 15:55:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 15:55:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 651. [2022-03-15 15:55:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.7446153846153845) internal successors, (1784), 650 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1784 transitions. [2022-03-15 15:55:50,824 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1784 transitions. Word has length 19 [2022-03-15 15:55:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:50,824 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1784 transitions. [2022-03-15 15:55:50,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1784 transitions. [2022-03-15 15:55:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:50,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:50,825 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:50,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:51,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:51,043 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:51,043 INFO L85 PathProgramCache]: Analyzing trace with hash -913990811, now seen corresponding path program 499 times [2022-03-15 15:55:51,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:51,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024813671] [2022-03-15 15:55:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:51,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:51,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:51,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024813671] [2022-03-15 15:55:51,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024813671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:51,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689498317] [2022-03-15 15:55:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:51,117 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:51,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-03-15 15:55:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:51,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:51,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:55:51,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:51,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:55:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:51,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:51,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:51,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:55:51,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:51,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:55:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:51,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689498317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:51,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:51,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:55:51,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474457692] [2022-03-15 15:55:51,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:51,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:51,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:51,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:51,457 INFO L87 Difference]: Start difference. First operand 651 states and 1784 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:51,603 INFO L93 Difference]: Finished difference Result 669 states and 1816 transitions. [2022-03-15 15:55:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:55:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:51,604 INFO L225 Difference]: With dead ends: 669 [2022-03-15 15:55:51,604 INFO L226 Difference]: Without dead ends: 663 [2022-03-15 15:55:51,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:51,604 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:51,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 274 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:55:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-15 15:55:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 651. [2022-03-15 15:55:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.7415384615384615) internal successors, (1782), 650 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1782 transitions. [2022-03-15 15:55:51,610 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1782 transitions. Word has length 19 [2022-03-15 15:55:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:51,610 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1782 transitions. [2022-03-15 15:55:51,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1782 transitions. [2022-03-15 15:55:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:51,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:51,611 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:51,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:51,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:51,827 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1907083301, now seen corresponding path program 500 times [2022-03-15 15:55:51,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:51,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109788354] [2022-03-15 15:55:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:51,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:51,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109788354] [2022-03-15 15:55:51,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109788354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:51,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235085223] [2022-03-15 15:55:51,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:51,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:51,892 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:51,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-03-15 15:55:51,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:52,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:52,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:52,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:55:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:52,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:52,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:52,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:52,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235085223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:52,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:52,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:52,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325012806] [2022-03-15 15:55:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:52,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:52,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:52,127 INFO L87 Difference]: Start difference. First operand 651 states and 1782 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:52,302 INFO L93 Difference]: Finished difference Result 763 states and 2007 transitions. [2022-03-15 15:55:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:52,303 INFO L225 Difference]: With dead ends: 763 [2022-03-15 15:55:52,303 INFO L226 Difference]: Without dead ends: 763 [2022-03-15 15:55:52,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:52,304 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:52,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 177 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-03-15 15:55:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 657. [2022-03-15 15:55:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.75) internal successors, (1804), 656 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1804 transitions. [2022-03-15 15:55:52,314 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1804 transitions. Word has length 19 [2022-03-15 15:55:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:52,314 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1804 transitions. [2022-03-15 15:55:52,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1804 transitions. [2022-03-15 15:55:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:52,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:52,315 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:52,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:52,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2022-03-15 15:55:52,531 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:52,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash -239087459, now seen corresponding path program 501 times [2022-03-15 15:55:52,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:52,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043844841] [2022-03-15 15:55:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:52,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043844841] [2022-03-15 15:55:52,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043844841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:52,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939004995] [2022-03-15 15:55:52,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:52,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:52,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:52,596 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:52,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-03-15 15:55:52,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:52,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:52,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:52,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:52,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:52,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:52,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:52,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:52,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939004995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:52,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:52,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:52,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021639369] [2022-03-15 15:55:52,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:52,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:52,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:52,822 INFO L87 Difference]: Start difference. First operand 657 states and 1804 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:53,096 INFO L93 Difference]: Finished difference Result 805 states and 2091 transitions. [2022-03-15 15:55:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:55:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:53,098 INFO L225 Difference]: With dead ends: 805 [2022-03-15 15:55:53,098 INFO L226 Difference]: Without dead ends: 805 [2022-03-15 15:55:53,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:53,098 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:53,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 203 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-03-15 15:55:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 655. [2022-03-15 15:55:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.753822629969419) internal successors, (1801), 654 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1801 transitions. [2022-03-15 15:55:53,105 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1801 transitions. Word has length 19 [2022-03-15 15:55:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:53,105 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1801 transitions. [2022-03-15 15:55:53,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1801 transitions. [2022-03-15 15:55:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:53,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:53,106 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:53,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:53,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:53,322 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1949095717, now seen corresponding path program 502 times [2022-03-15 15:55:53,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:53,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341459807] [2022-03-15 15:55:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:53,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:53,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341459807] [2022-03-15 15:55:53,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341459807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:53,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154651394] [2022-03-15 15:55:53,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:53,450 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:53,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-03-15 15:55:53,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:53,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:53,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:53,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:53,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:53,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:55:53,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:53,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:55:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:53,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154651394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:53,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:53,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:53,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774821986] [2022-03-15 15:55:53,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:53,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:53,825 INFO L87 Difference]: Start difference. First operand 655 states and 1801 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:54,221 INFO L93 Difference]: Finished difference Result 755 states and 1982 transitions. [2022-03-15 15:55:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:54,223 INFO L225 Difference]: With dead ends: 755 [2022-03-15 15:55:54,223 INFO L226 Difference]: Without dead ends: 755 [2022-03-15 15:55:54,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:54,223 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:54,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 206 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 529 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-03-15 15:55:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-15 15:55:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 656. [2022-03-15 15:55:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7541984732824427) internal successors, (1804), 655 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1804 transitions. [2022-03-15 15:55:54,230 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1804 transitions. Word has length 19 [2022-03-15 15:55:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1804 transitions. [2022-03-15 15:55:54,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1804 transitions. [2022-03-15 15:55:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:54,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:54,231 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:54,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-03-15 15:55:54,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:54,431 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:54,431 INFO L85 PathProgramCache]: Analyzing trace with hash -985754839, now seen corresponding path program 503 times [2022-03-15 15:55:54,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:54,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493161048] [2022-03-15 15:55:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:54,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:54,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:54,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493161048] [2022-03-15 15:55:54,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493161048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:54,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373760608] [2022-03-15 15:55:54,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:54,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:54,530 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-03-15 15:55:54,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:55:54,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:54,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:54,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:54,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:54,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:54,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:54,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:54,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:54,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373760608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:54,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:54,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:54,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873349160] [2022-03-15 15:55:54,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:54,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:54,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:54,900 INFO L87 Difference]: Start difference. First operand 656 states and 1804 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:55,486 INFO L93 Difference]: Finished difference Result 862 states and 2219 transitions. [2022-03-15 15:55:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:55:55,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:55,488 INFO L225 Difference]: With dead ends: 862 [2022-03-15 15:55:55,488 INFO L226 Difference]: Without dead ends: 862 [2022-03-15 15:55:55,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:55:55,488 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:55,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 235 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 711 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-03-15 15:55:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-03-15 15:55:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 665. [2022-03-15 15:55:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7680722891566263) internal successors, (1838), 664 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1838 transitions. [2022-03-15 15:55:55,496 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1838 transitions. Word has length 19 [2022-03-15 15:55:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:55,496 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1838 transitions. [2022-03-15 15:55:55,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1838 transitions. [2022-03-15 15:55:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:55,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:55,497 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:55,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:55,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:55,697 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -373607433, now seen corresponding path program 504 times [2022-03-15 15:55:55,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:55,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995842516] [2022-03-15 15:55:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:55,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:55,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:55,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995842516] [2022-03-15 15:55:55,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995842516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:55,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111209688] [2022-03-15 15:55:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:55,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:55,800 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:55,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-03-15 15:55:55,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:55:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:55,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:55,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:55:55,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:55,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:55:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:56,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:56,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:56,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:55:56,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:56,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:55:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:56,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111209688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:56,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:56,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:55:56,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665647352] [2022-03-15 15:55:56,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:56,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:56,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:56,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:56,173 INFO L87 Difference]: Start difference. First operand 665 states and 1838 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:56,497 INFO L93 Difference]: Finished difference Result 786 states and 2061 transitions. [2022-03-15 15:55:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:56,498 INFO L225 Difference]: With dead ends: 786 [2022-03-15 15:55:56,498 INFO L226 Difference]: Without dead ends: 786 [2022-03-15 15:55:56,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:55:56,499 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:56,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 165 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 389 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-03-15 15:55:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-15 15:55:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 662. [2022-03-15 15:55:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.75642965204236) internal successors, (1822), 661 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1822 transitions. [2022-03-15 15:55:56,506 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1822 transitions. Word has length 19 [2022-03-15 15:55:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:56,506 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1822 transitions. [2022-03-15 15:55:56,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1822 transitions. [2022-03-15 15:55:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:56,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:56,506 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:56,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:56,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:56,722 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash -473351693, now seen corresponding path program 505 times [2022-03-15 15:55:56,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:56,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340967711] [2022-03-15 15:55:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:56,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:56,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340967711] [2022-03-15 15:55:56,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340967711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:56,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230366674] [2022-03-15 15:55:56,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:56,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:56,849 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:56,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-03-15 15:55:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:57,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:57,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:57,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:57,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:57,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:57,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:57,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:55:57,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:57,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:55:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:57,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230366674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:57,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:57,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:57,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710801969] [2022-03-15 15:55:57,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:57,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:57,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:57,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:57,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:57,222 INFO L87 Difference]: Start difference. First operand 662 states and 1822 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:57,704 INFO L93 Difference]: Finished difference Result 765 states and 2002 transitions. [2022-03-15 15:55:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:55:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:57,706 INFO L225 Difference]: With dead ends: 765 [2022-03-15 15:55:57,706 INFO L226 Difference]: Without dead ends: 765 [2022-03-15 15:55:57,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:55:57,706 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:57,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 198 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 474 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-15 15:55:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-15 15:55:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 665. [2022-03-15 15:55:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7575301204819276) internal successors, (1831), 664 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1831 transitions. [2022-03-15 15:55:57,713 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1831 transitions. Word has length 19 [2022-03-15 15:55:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:57,714 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1831 transitions. [2022-03-15 15:55:57,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1831 transitions. [2022-03-15 15:55:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:57,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:57,714 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:57,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:57,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-03-15 15:55:57,930 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:57,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1340801341, now seen corresponding path program 506 times [2022-03-15 15:55:57,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:57,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002434566] [2022-03-15 15:55:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:57,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:58,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:58,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002434566] [2022-03-15 15:55:58,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002434566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:58,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041097232] [2022-03-15 15:55:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:58,052 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:58,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-03-15 15:55:58,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:58,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:55:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:58,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:55:58,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:58,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:55:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:58,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:58,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:58,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:58,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:58,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:58,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041097232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:58,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:58,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:55:58,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358295630] [2022-03-15 15:55:58,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:58,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:58,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:58,402 INFO L87 Difference]: Start difference. First operand 665 states and 1831 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:58,963 INFO L93 Difference]: Finished difference Result 814 states and 2138 transitions. [2022-03-15 15:55:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:55:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:58,966 INFO L225 Difference]: With dead ends: 814 [2022-03-15 15:55:58,966 INFO L226 Difference]: Without dead ends: 808 [2022-03-15 15:55:58,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=1334, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:55:58,966 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:58,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 152 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 483 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-03-15 15:55:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-03-15 15:55:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 687. [2022-03-15 15:55:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 2.7798833819241984) internal successors, (1907), 686 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1907 transitions. [2022-03-15 15:55:58,974 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1907 transitions. Word has length 19 [2022-03-15 15:55:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:58,974 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1907 transitions. [2022-03-15 15:55:58,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1907 transitions. [2022-03-15 15:55:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:58,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:58,975 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:58,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-03-15 15:55:59,191 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:59,191 INFO L85 PathProgramCache]: Analyzing trace with hash 886765047, now seen corresponding path program 507 times [2022-03-15 15:55:59,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:59,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597766784] [2022-03-15 15:55:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:59,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597766784] [2022-03-15 15:55:59,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597766784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:59,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265042377] [2022-03-15 15:55:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:59,292 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:59,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-03-15 15:55:59,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:59,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:59,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:55:59,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:59,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:55:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:59,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:59,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:55:59,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:59,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:55:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265042377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:59,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:59,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:55:59,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119633072] [2022-03-15 15:55:59,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:59,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:59,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:59,657 INFO L87 Difference]: Start difference. First operand 687 states and 1907 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:59,899 INFO L93 Difference]: Finished difference Result 807 states and 2127 transitions. [2022-03-15 15:55:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:55:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:59,900 INFO L225 Difference]: With dead ends: 807 [2022-03-15 15:55:59,900 INFO L226 Difference]: Without dead ends: 807 [2022-03-15 15:55:59,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:59,900 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:59,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 223 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 568 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-03-15 15:55:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-15 15:55:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 681. [2022-03-15 15:55:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 2.776470588235294) internal successors, (1888), 680 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1888 transitions. [2022-03-15 15:55:59,914 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1888 transitions. Word has length 19 [2022-03-15 15:55:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:59,914 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1888 transitions. [2022-03-15 15:55:59,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1888 transitions. [2022-03-15 15:55:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:55:59,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:59,915 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:59,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-03-15 15:56:00,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:00,131 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 491842631, now seen corresponding path program 508 times [2022-03-15 15:56:00,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:00,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460114156] [2022-03-15 15:56:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:00,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:00,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460114156] [2022-03-15 15:56:00,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460114156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:00,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408394051] [2022-03-15 15:56:00,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:00,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:00,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:00,253 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:00,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-03-15 15:56:00,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:00,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:00,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:00,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:00,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:00,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:00,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:00,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:00,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:00,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:00,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408394051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:00,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:00,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:00,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023045013] [2022-03-15 15:56:00,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:00,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:00,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:00,626 INFO L87 Difference]: Start difference. First operand 681 states and 1888 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:01,014 INFO L93 Difference]: Finished difference Result 759 states and 2016 transitions. [2022-03-15 15:56:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:01,016 INFO L225 Difference]: With dead ends: 759 [2022-03-15 15:56:01,016 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 15:56:01,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:56:01,016 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:01,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 144 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 340 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:56:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 15:56:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 680. [2022-03-15 15:56:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 2.776141384388807) internal successors, (1885), 679 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1885 transitions. [2022-03-15 15:56:01,023 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1885 transitions. Word has length 19 [2022-03-15 15:56:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:01,023 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1885 transitions. [2022-03-15 15:56:01,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1885 transitions. [2022-03-15 15:56:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:01,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:01,024 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:01,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:01,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:01,239 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1259405713, now seen corresponding path program 509 times [2022-03-15 15:56:01,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:01,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482094191] [2022-03-15 15:56:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:01,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:01,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482094191] [2022-03-15 15:56:01,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482094191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:01,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109222241] [2022-03-15 15:56:01,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:01,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:01,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:01,308 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:01,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-03-15 15:56:01,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:01,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:01,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:01,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:01,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:01,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:01,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:01,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:01,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:01,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:01,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:01,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109222241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:01,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:01,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:01,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485375501] [2022-03-15 15:56:01,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:01,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:01,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:01,568 INFO L87 Difference]: Start difference. First operand 680 states and 1885 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:01,887 INFO L93 Difference]: Finished difference Result 763 states and 2023 transitions. [2022-03-15 15:56:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:01,888 INFO L225 Difference]: With dead ends: 763 [2022-03-15 15:56:01,888 INFO L226 Difference]: Without dead ends: 763 [2022-03-15 15:56:01,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:56:01,889 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 119 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 314 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-03-15 15:56:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-03-15 15:56:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 666. [2022-03-15 15:56:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.7578947368421054) internal successors, (1834), 665 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1834 transitions. [2022-03-15 15:56:01,895 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1834 transitions. Word has length 19 [2022-03-15 15:56:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:01,895 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1834 transitions. [2022-03-15 15:56:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1834 transitions. [2022-03-15 15:56:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:01,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:01,896 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-03-15 15:56:02,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:02,112 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:02,112 INFO L85 PathProgramCache]: Analyzing trace with hash 928777463, now seen corresponding path program 510 times [2022-03-15 15:56:02,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:02,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873927552] [2022-03-15 15:56:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:02,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:02,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873927552] [2022-03-15 15:56:02,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873927552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:02,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328724007] [2022-03-15 15:56:02,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:02,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:02,194 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:02,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-03-15 15:56:02,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:02,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:02,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:02,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:02,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:02,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:02,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:02,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:02,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:02,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328724007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:02,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:02,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:56:02,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118019087] [2022-03-15 15:56:02,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:02,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:56:02,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:56:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:02,481 INFO L87 Difference]: Start difference. First operand 666 states and 1834 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:02,613 INFO L93 Difference]: Finished difference Result 711 states and 1915 transitions. [2022-03-15 15:56:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:02,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:02,615 INFO L225 Difference]: With dead ends: 711 [2022-03-15 15:56:02,615 INFO L226 Difference]: Without dead ends: 711 [2022-03-15 15:56:02,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:02,615 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:02,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 104 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 333 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-03-15 15:56:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-15 15:56:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 658. [2022-03-15 15:56:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.750380517503805) internal successors, (1807), 657 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1807 transitions. [2022-03-15 15:56:02,621 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:02,621 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1807 transitions. [2022-03-15 15:56:02,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1807 transitions. [2022-03-15 15:56:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:02,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:02,622 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:02,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:02,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:02,835 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1358741985, now seen corresponding path program 511 times [2022-03-15 15:56:02,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:02,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412321154] [2022-03-15 15:56:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:02,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:02,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412321154] [2022-03-15 15:56:02,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412321154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:02,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040912986] [2022-03-15 15:56:02,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:02,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:02,902 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:02,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-03-15 15:56:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:03,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:03,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:03,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:03,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:03,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:03,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:03,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:03,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:03,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:03,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040912986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:03,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:03,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:56:03,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750902325] [2022-03-15 15:56:03,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:03,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:56:03,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:56:03,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:03,167 INFO L87 Difference]: Start difference. First operand 658 states and 1807 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:03,312 INFO L93 Difference]: Finished difference Result 725 states and 1927 transitions. [2022-03-15 15:56:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:03,313 INFO L225 Difference]: With dead ends: 725 [2022-03-15 15:56:03,313 INFO L226 Difference]: Without dead ends: 725 [2022-03-15 15:56:03,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:03,313 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:03,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-03-15 15:56:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-15 15:56:03,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 655. [2022-03-15 15:56:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.7507645259938838) internal successors, (1799), 654 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1799 transitions. [2022-03-15 15:56:03,320 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1799 transitions. Word has length 19 [2022-03-15 15:56:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:03,320 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1799 transitions. [2022-03-15 15:56:03,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1799 transitions. [2022-03-15 15:56:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:03,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:03,321 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:03,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:03,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2022-03-15 15:56:03,537 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2131672699, now seen corresponding path program 512 times [2022-03-15 15:56:03,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:03,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992813135] [2022-03-15 15:56:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:03,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:03,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992813135] [2022-03-15 15:56:03,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992813135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:03,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257306140] [2022-03-15 15:56:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:03,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:03,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:03,646 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-03-15 15:56:03,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:03,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:03,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:03,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:03,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:03,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:03,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:03,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:03,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:03,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:03,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:03,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257306140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:04,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:04,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:56:04,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605077963] [2022-03-15 15:56:04,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:04,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:04,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:04,013 INFO L87 Difference]: Start difference. First operand 655 states and 1799 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:04,304 INFO L93 Difference]: Finished difference Result 740 states and 1948 transitions. [2022-03-15 15:56:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:04,305 INFO L225 Difference]: With dead ends: 740 [2022-03-15 15:56:04,305 INFO L226 Difference]: Without dead ends: 740 [2022-03-15 15:56:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:04,305 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:04,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 218 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 566 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-03-15 15:56:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-15 15:56:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 658. [2022-03-15 15:56:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.750380517503805) internal successors, (1807), 657 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1807 transitions. [2022-03-15 15:56:04,313 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:04,313 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1807 transitions. [2022-03-15 15:56:04,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1807 transitions. [2022-03-15 15:56:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:04,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:04,314 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:04,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:04,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:04,527 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1264223051, now seen corresponding path program 513 times [2022-03-15 15:56:04,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:04,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617816409] [2022-03-15 15:56:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:04,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617816409] [2022-03-15 15:56:04,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617816409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:04,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188123178] [2022-03-15 15:56:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:04,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:04,620 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-03-15 15:56:04,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:56:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:04,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:04,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:04,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:04,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:04,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:04,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:04,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:04,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188123178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:04,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:04,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:04,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105864179] [2022-03-15 15:56:04,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:04,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:04,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:04,983 INFO L87 Difference]: Start difference. First operand 658 states and 1807 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:05,358 INFO L93 Difference]: Finished difference Result 720 states and 1918 transitions. [2022-03-15 15:56:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:56:05,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:05,359 INFO L225 Difference]: With dead ends: 720 [2022-03-15 15:56:05,359 INFO L226 Difference]: Without dead ends: 714 [2022-03-15 15:56:05,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:05,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:05,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 190 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 416 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-03-15 15:56:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-15 15:56:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 659. [2022-03-15 15:56:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7492401215805473) internal successors, (1809), 658 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1809 transitions. [2022-03-15 15:56:05,366 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1809 transitions. Word has length 19 [2022-03-15 15:56:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:05,366 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1809 transitions. [2022-03-15 15:56:05,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1809 transitions. [2022-03-15 15:56:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:05,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:05,367 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:05,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:05,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2022-03-15 15:56:05,567 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -803177857, now seen corresponding path program 514 times [2022-03-15 15:56:05,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:05,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816524882] [2022-03-15 15:56:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:05,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:05,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:05,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816524882] [2022-03-15 15:56:05,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816524882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:05,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244739042] [2022-03-15 15:56:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:05,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:05,680 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:05,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-03-15 15:56:05,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:05,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:05,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:05,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:05,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:05,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:05,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:05,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:06,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:06,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:06,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:06,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:06,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244739042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:06,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:06,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:56:06,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038490993] [2022-03-15 15:56:06,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:06,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:06,145 INFO L87 Difference]: Start difference. First operand 659 states and 1809 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:06,926 INFO L93 Difference]: Finished difference Result 779 states and 2032 transitions. [2022-03-15 15:56:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:56:06,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:06,928 INFO L225 Difference]: With dead ends: 779 [2022-03-15 15:56:06,928 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:56:06,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:56:06,928 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:06,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 227 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 511 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2022-03-15 15:56:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:56:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 660. [2022-03-15 15:56:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7511380880121394) internal successors, (1813), 659 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1813 transitions. [2022-03-15 15:56:06,935 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1813 transitions. Word has length 19 [2022-03-15 15:56:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:06,935 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1813 transitions. [2022-03-15 15:56:06,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1813 transitions. [2022-03-15 15:56:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:06,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:06,936 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:06,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:07,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:07,151 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1198100273, now seen corresponding path program 515 times [2022-03-15 15:56:07,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:07,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045376483] [2022-03-15 15:56:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:07,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:07,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:07,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045376483] [2022-03-15 15:56:07,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045376483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:07,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541435970] [2022-03-15 15:56:07,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:07,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:07,290 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:07,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-03-15 15:56:07,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:07,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:07,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:07,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:07,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:07,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:07,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:07,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:07,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:07,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:07,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:07,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541435970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:07,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:07,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:07,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461650513] [2022-03-15 15:56:07,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:07,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:07,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:07,710 INFO L87 Difference]: Start difference. First operand 660 states and 1813 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:08,249 INFO L93 Difference]: Finished difference Result 725 states and 1924 transitions. [2022-03-15 15:56:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:56:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:08,250 INFO L225 Difference]: With dead ends: 725 [2022-03-15 15:56:08,250 INFO L226 Difference]: Without dead ends: 723 [2022-03-15 15:56:08,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:56:08,251 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:08,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 238 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 505 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-03-15 15:56:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-03-15 15:56:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 659. [2022-03-15 15:56:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7507598784194527) internal successors, (1810), 658 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1810 transitions. [2022-03-15 15:56:08,257 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1810 transitions. Word has length 19 [2022-03-15 15:56:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:08,257 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1810 transitions. [2022-03-15 15:56:08,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1810 transitions. [2022-03-15 15:56:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:08,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:08,258 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:08,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Ended with exit code 0 [2022-03-15 15:56:08,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-03-15 15:56:08,474 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:08,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1345618679, now seen corresponding path program 516 times [2022-03-15 15:56:08,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:08,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022576652] [2022-03-15 15:56:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:08,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:08,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022576652] [2022-03-15 15:56:08,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022576652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:08,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64794684] [2022-03-15 15:56:08,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:08,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:08,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:08,586 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:08,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-03-15 15:56:08,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:56:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:08,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:08,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:08,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:08,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:08,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:08,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:08,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:08,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:09,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64794684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:09,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:09,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:56:09,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139931377] [2022-03-15 15:56:09,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:09,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:09,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:09,050 INFO L87 Difference]: Start difference. First operand 659 states and 1810 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:09,733 INFO L93 Difference]: Finished difference Result 740 states and 1966 transitions. [2022-03-15 15:56:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:56:09,733 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:09,734 INFO L225 Difference]: With dead ends: 740 [2022-03-15 15:56:09,734 INFO L226 Difference]: Without dead ends: 740 [2022-03-15 15:56:09,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:56:09,735 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:09,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 169 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 367 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-03-15 15:56:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-15 15:56:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 658. [2022-03-15 15:56:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.750380517503805) internal successors, (1807), 657 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1807 transitions. [2022-03-15 15:56:09,741 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:09,741 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1807 transitions. [2022-03-15 15:56:09,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1807 transitions. [2022-03-15 15:56:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:09,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:09,742 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:09,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:09,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-03-15 15:56:09,957 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash -761165441, now seen corresponding path program 517 times [2022-03-15 15:56:09,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:09,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751919718] [2022-03-15 15:56:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:09,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:10,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:10,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751919718] [2022-03-15 15:56:10,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751919718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:10,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918438867] [2022-03-15 15:56:10,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:10,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:10,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:10,065 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:10,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-03-15 15:56:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:10,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:10,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:10,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:10,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:56:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:10,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:10,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:10,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:10,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:10,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:10,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918438867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:10,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:10,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:56:10,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433229322] [2022-03-15 15:56:10,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:10,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:10,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:10,513 INFO L87 Difference]: Start difference. First operand 658 states and 1807 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:10,790 INFO L93 Difference]: Finished difference Result 709 states and 1907 transitions. [2022-03-15 15:56:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:10,791 INFO L225 Difference]: With dead ends: 709 [2022-03-15 15:56:10,791 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 15:56:10,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:56:10,791 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:10,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 149 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 380 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-15 15:56:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 15:56:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 658. [2022-03-15 15:56:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.750380517503805) internal successors, (1807), 657 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1807 transitions. [2022-03-15 15:56:10,798 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:10,798 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1807 transitions. [2022-03-15 15:56:10,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1807 transitions. [2022-03-15 15:56:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:10,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:10,799 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:10,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Ended with exit code 0 [2022-03-15 15:56:10,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:10,999 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:10,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1646963721, now seen corresponding path program 518 times [2022-03-15 15:56:10,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:10,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528742188] [2022-03-15 15:56:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:11,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:11,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528742188] [2022-03-15 15:56:11,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528742188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:11,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243747001] [2022-03-15 15:56:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:11,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:11,103 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:11,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-03-15 15:56:11,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:11,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:11,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:11,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:11,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:11,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:56:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:11,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:11,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:11,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:11,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243747001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:11,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:11,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 15:56:11,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363517151] [2022-03-15 15:56:11,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:11,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:11,518 INFO L87 Difference]: Start difference. First operand 658 states and 1807 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:11,650 INFO L93 Difference]: Finished difference Result 691 states and 1875 transitions. [2022-03-15 15:56:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:11,652 INFO L225 Difference]: With dead ends: 691 [2022-03-15 15:56:11,652 INFO L226 Difference]: Without dead ends: 691 [2022-03-15 15:56:11,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:11,652 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:11,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 123 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-03-15 15:56:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-15 15:56:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 662. [2022-03-15 15:56:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.7518910741301057) internal successors, (1819), 661 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1819 transitions. [2022-03-15 15:56:11,658 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1819 transitions. Word has length 19 [2022-03-15 15:56:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:11,658 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1819 transitions. [2022-03-15 15:56:11,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1819 transitions. [2022-03-15 15:56:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:11,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:11,659 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:11,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:11,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2022-03-15 15:56:11,872 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash -681769397, now seen corresponding path program 519 times [2022-03-15 15:56:11,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:11,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911469432] [2022-03-15 15:56:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:11,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:11,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911469432] [2022-03-15 15:56:11,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911469432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:11,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104166437] [2022-03-15 15:56:11,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:11,970 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:11,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-03-15 15:56:12,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:12,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:12,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:12,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:12,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:12,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:12,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:12,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:12,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:12,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:12,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104166437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:12,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:12,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 15:56:12,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027235013] [2022-03-15 15:56:12,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:12,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:56:12,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:56:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:12,396 INFO L87 Difference]: Start difference. First operand 662 states and 1819 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:12,537 INFO L93 Difference]: Finished difference Result 709 states and 1908 transitions. [2022-03-15 15:56:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:12,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:12,538 INFO L225 Difference]: With dead ends: 709 [2022-03-15 15:56:12,538 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 15:56:12,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:12,539 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:12,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 128 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 374 Invalid, 0 Unknown, 174 Unchecked, 0.1s Time] [2022-03-15 15:56:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 15:56:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 658. [2022-03-15 15:56:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.750380517503805) internal successors, (1807), 657 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1807 transitions. [2022-03-15 15:56:12,545 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:12,545 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1807 transitions. [2022-03-15 15:56:12,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1807 transitions. [2022-03-15 15:56:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:12,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:12,546 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:12,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-03-15 15:56:12,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2022-03-15 15:56:12,762 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1642768443, now seen corresponding path program 520 times [2022-03-15 15:56:12,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:12,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428865491] [2022-03-15 15:56:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:12,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:12,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428865491] [2022-03-15 15:56:12,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428865491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:12,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124853177] [2022-03-15 15:56:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:12,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:12,863 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:12,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-03-15 15:56:12,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:12,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:12,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:13,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:13,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:13,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:13,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:13,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:13,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:13,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:13,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124853177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:13,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:13,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:13,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766565325] [2022-03-15 15:56:13,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:13,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:13,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:13,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:13,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:13,220 INFO L87 Difference]: Start difference. First operand 658 states and 1807 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:13,592 INFO L93 Difference]: Finished difference Result 807 states and 2109 transitions. [2022-03-15 15:56:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:56:13,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:13,593 INFO L225 Difference]: With dead ends: 807 [2022-03-15 15:56:13,593 INFO L226 Difference]: Without dead ends: 807 [2022-03-15 15:56:13,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:13,593 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:13,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 194 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-15 15:56:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 662. [2022-03-15 15:56:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.7534039334341904) internal successors, (1820), 661 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1820 transitions. [2022-03-15 15:56:13,600 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1820 transitions. Word has length 19 [2022-03-15 15:56:13,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:13,600 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1820 transitions. [2022-03-15 15:56:13,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1820 transitions. [2022-03-15 15:56:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:13,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:13,601 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:13,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Ended with exit code 0 [2022-03-15 15:56:13,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-03-15 15:56:13,807 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash -464015677, now seen corresponding path program 521 times [2022-03-15 15:56:13,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:13,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251706227] [2022-03-15 15:56:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:13,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:13,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251706227] [2022-03-15 15:56:13,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251706227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:13,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776197696] [2022-03-15 15:56:13,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:13,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:13,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:13,916 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:13,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-03-15 15:56:13,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:14,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:14,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:14,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:14,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:14,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:14,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:14,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:14,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:14,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:14,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776197696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:14,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:14,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:14,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758628579] [2022-03-15 15:56:14,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:14,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:14,264 INFO L87 Difference]: Start difference. First operand 662 states and 1820 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:14,909 INFO L93 Difference]: Finished difference Result 859 states and 2221 transitions. [2022-03-15 15:56:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:56:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:14,911 INFO L225 Difference]: With dead ends: 859 [2022-03-15 15:56:14,911 INFO L226 Difference]: Without dead ends: 859 [2022-03-15 15:56:14,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:56:14,911 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:14,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 168 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-03-15 15:56:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 660. [2022-03-15 15:56:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7511380880121394) internal successors, (1813), 659 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1813 transitions. [2022-03-15 15:56:14,924 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1813 transitions. Word has length 19 [2022-03-15 15:56:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1813 transitions. [2022-03-15 15:56:14,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1813 transitions. [2022-03-15 15:56:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:14,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:14,925 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:14,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:15,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:15,126 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1684780859, now seen corresponding path program 522 times [2022-03-15 15:56:15,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:15,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711428410] [2022-03-15 15:56:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:15,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:15,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:15,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711428410] [2022-03-15 15:56:15,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711428410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:15,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778166914] [2022-03-15 15:56:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:15,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:15,246 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:15,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-03-15 15:56:15,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:56:15,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:15,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:15,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:15,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:15,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:15,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:15,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:15,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:15,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:15,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:15,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:15,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778166914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:15,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:15,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:15,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368933124] [2022-03-15 15:56:15,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:15,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:15,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:15,578 INFO L87 Difference]: Start difference. First operand 660 states and 1813 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:16,477 INFO L93 Difference]: Finished difference Result 927 states and 2350 transitions. [2022-03-15 15:56:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:56:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:16,479 INFO L225 Difference]: With dead ends: 927 [2022-03-15 15:56:16,479 INFO L226 Difference]: Without dead ends: 927 [2022-03-15 15:56:16,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:56:16,479 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:16,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 288 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-03-15 15:56:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 657. [2022-03-15 15:56:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7484756097560976) internal successors, (1803), 656 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1803 transitions. [2022-03-15 15:56:16,486 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1803 transitions. Word has length 19 [2022-03-15 15:56:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:16,486 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1803 transitions. [2022-03-15 15:56:16,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1803 transitions. [2022-03-15 15:56:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:16,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:16,487 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:16,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-03-15 15:56:16,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:16,699 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1250069697, now seen corresponding path program 523 times [2022-03-15 15:56:16,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:16,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884060687] [2022-03-15 15:56:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:16,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:16,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884060687] [2022-03-15 15:56:16,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884060687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:16,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091984795] [2022-03-15 15:56:16,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:16,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:16,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:16,824 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:16,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-03-15 15:56:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:16,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:16,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:16,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:16,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:17,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:17,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:17,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:17,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:17,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091984795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:17,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:17,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:17,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483742377] [2022-03-15 15:56:17,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:17,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:17,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:17,153 INFO L87 Difference]: Start difference. First operand 657 states and 1803 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:17,606 INFO L93 Difference]: Finished difference Result 769 states and 2008 transitions. [2022-03-15 15:56:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:56:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:17,607 INFO L225 Difference]: With dead ends: 769 [2022-03-15 15:56:17,607 INFO L226 Difference]: Without dead ends: 769 [2022-03-15 15:56:17,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:17,607 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:17,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 152 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-03-15 15:56:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 645. [2022-03-15 15:56:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7453416149068324) internal successors, (1768), 644 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1768 transitions. [2022-03-15 15:56:17,614 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1768 transitions. Word has length 19 [2022-03-15 15:56:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1768 transitions. [2022-03-15 15:56:17,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1768 transitions. [2022-03-15 15:56:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:17,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:17,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:17,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:17,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2022-03-15 15:56:17,828 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1940197491, now seen corresponding path program 524 times [2022-03-15 15:56:17,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:17,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124054743] [2022-03-15 15:56:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:17,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:17,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124054743] [2022-03-15 15:56:17,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124054743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:17,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935714235] [2022-03-15 15:56:17,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:17,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:17,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:17,933 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:17,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-03-15 15:56:17,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:18,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-03-15 15:56:18,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:18,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-15 15:56:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:18,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:18,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:18,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 15:56:18,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:18,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 15:56:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:18,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935714235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:18,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:18,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:56:18,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125857675] [2022-03-15 15:56:18,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:18,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:56:18,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:56:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:18,270 INFO L87 Difference]: Start difference. First operand 645 states and 1768 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:18,661 INFO L93 Difference]: Finished difference Result 712 states and 1880 transitions. [2022-03-15 15:56:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:18,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:18,662 INFO L225 Difference]: With dead ends: 712 [2022-03-15 15:56:18,662 INFO L226 Difference]: Without dead ends: 700 [2022-03-15 15:56:18,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:18,663 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:18,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 148 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-15 15:56:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 645. [2022-03-15 15:56:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7422360248447206) internal successors, (1766), 644 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1766 transitions. [2022-03-15 15:56:18,669 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1766 transitions. Word has length 19 [2022-03-15 15:56:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:18,669 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1766 transitions. [2022-03-15 15:56:18,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1766 transitions. [2022-03-15 15:56:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:18,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:18,670 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:18,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:18,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2022-03-15 15:56:18,870 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash 227527773, now seen corresponding path program 525 times [2022-03-15 15:56:18,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:18,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420505725] [2022-03-15 15:56:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:18,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:18,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420505725] [2022-03-15 15:56:18,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420505725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:18,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916703009] [2022-03-15 15:56:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:18,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:18,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:18,968 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:18,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-03-15 15:56:18,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:18,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:18,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:19,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:19,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:19,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:19,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:19,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:19,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:19,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916703009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:19,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:19,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:19,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687874628] [2022-03-15 15:56:19,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:19,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:19,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:19,286 INFO L87 Difference]: Start difference. First operand 645 states and 1766 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:19,761 INFO L93 Difference]: Finished difference Result 808 states and 2110 transitions. [2022-03-15 15:56:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:56:19,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:19,762 INFO L225 Difference]: With dead ends: 808 [2022-03-15 15:56:19,762 INFO L226 Difference]: Without dead ends: 804 [2022-03-15 15:56:19,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:56:19,763 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:19,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 168 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-15 15:56:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 644. [2022-03-15 15:56:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.7433903576982894) internal successors, (1764), 643 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1764 transitions. [2022-03-15 15:56:19,769 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1764 transitions. Word has length 19 [2022-03-15 15:56:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1764 transitions. [2022-03-15 15:56:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1764 transitions. [2022-03-15 15:56:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:19,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:19,770 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:19,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Ended with exit code 0 [2022-03-15 15:56:19,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-03-15 15:56:19,986 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash 52315199, now seen corresponding path program 526 times [2022-03-15 15:56:19,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:19,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23782813] [2022-03-15 15:56:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:20,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:20,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23782813] [2022-03-15 15:56:20,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23782813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:20,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269272625] [2022-03-15 15:56:20,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:20,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:20,057 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:20,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-03-15 15:56:20,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:20,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:20,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:20,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:20,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:20,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:20,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:20,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:20,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:20,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:20,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269272625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:20,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:20,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:20,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080994500] [2022-03-15 15:56:20,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:20,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:20,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:20,445 INFO L87 Difference]: Start difference. First operand 644 states and 1764 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:20,901 INFO L93 Difference]: Finished difference Result 808 states and 2098 transitions. [2022-03-15 15:56:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:56:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:20,903 INFO L225 Difference]: With dead ends: 808 [2022-03-15 15:56:20,903 INFO L226 Difference]: Without dead ends: 808 [2022-03-15 15:56:20,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:20,903 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:20,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 171 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 592 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-15 15:56:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-03-15 15:56:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 646. [2022-03-15 15:56:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.744186046511628) internal successors, (1770), 645 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1770 transitions. [2022-03-15 15:56:20,910 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1770 transitions. Word has length 19 [2022-03-15 15:56:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1770 transitions. [2022-03-15 15:56:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1770 transitions. [2022-03-15 15:56:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:20,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:20,911 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:20,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:21,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:21,115 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 664462605, now seen corresponding path program 527 times [2022-03-15 15:56:21,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:21,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897741319] [2022-03-15 15:56:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:21,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:21,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:21,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897741319] [2022-03-15 15:56:21,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897741319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:21,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250890109] [2022-03-15 15:56:21,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:21,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:21,212 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:21,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-03-15 15:56:21,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:56:21,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:21,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:21,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:21,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:21,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:21,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:21,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:21,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:21,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:21,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250890109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:21,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:21,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:21,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267288060] [2022-03-15 15:56:21,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:21,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:21,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:21,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:21,572 INFO L87 Difference]: Start difference. First operand 646 states and 1770 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:21,766 INFO L93 Difference]: Finished difference Result 729 states and 1955 transitions. [2022-03-15 15:56:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:56:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:21,767 INFO L225 Difference]: With dead ends: 729 [2022-03-15 15:56:21,767 INFO L226 Difference]: Without dead ends: 729 [2022-03-15 15:56:21,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:21,768 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:21,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-03-15 15:56:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-15 15:56:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 645. [2022-03-15 15:56:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7422360248447206) internal successors, (1766), 644 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1766 transitions. [2022-03-15 15:56:21,774 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1766 transitions. Word has length 19 [2022-03-15 15:56:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:21,774 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1766 transitions. [2022-03-15 15:56:21,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1766 transitions. [2022-03-15 15:56:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:21,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:21,775 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:21,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-03-15 15:56:21,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-03-15 15:56:21,987 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1629656929, now seen corresponding path program 528 times [2022-03-15 15:56:21,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:21,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093422208] [2022-03-15 15:56:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:22,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093422208] [2022-03-15 15:56:22,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093422208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:22,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683019218] [2022-03-15 15:56:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:22,054 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:22,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-03-15 15:56:22,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:22,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:22,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:22,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:56:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:22,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:22,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:22,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:22,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683019218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:22,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:22,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:22,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129769796] [2022-03-15 15:56:22,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:22,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:22,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:22,343 INFO L87 Difference]: Start difference. First operand 645 states and 1766 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:22,555 INFO L93 Difference]: Finished difference Result 749 states and 1982 transitions. [2022-03-15 15:56:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:56:22,555 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:22,556 INFO L225 Difference]: With dead ends: 749 [2022-03-15 15:56:22,556 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 15:56:22,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:22,556 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:22,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 143 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 480 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-03-15 15:56:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 15:56:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 644. [2022-03-15 15:56:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.7418351477449456) internal successors, (1763), 643 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1763 transitions. [2022-03-15 15:56:22,563 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1763 transitions. Word has length 19 [2022-03-15 15:56:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:22,563 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1763 transitions. [2022-03-15 15:56:22,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1763 transitions. [2022-03-15 15:56:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:22,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:22,563 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:22,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-03-15 15:56:22,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2022-03-15 15:56:22,779 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:22,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1880481147, now seen corresponding path program 529 times [2022-03-15 15:56:22,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:22,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955179397] [2022-03-15 15:56:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:22,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:22,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955179397] [2022-03-15 15:56:22,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955179397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:22,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314694665] [2022-03-15 15:56:22,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:22,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:22,893 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:22,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-03-15 15:56:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:23,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:23,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:56:23,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:23,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:56:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:23,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:23,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:23,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:56:23,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:23,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:56:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:23,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314694665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:23,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:23,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:23,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209665606] [2022-03-15 15:56:23,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:23,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:23,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:23,245 INFO L87 Difference]: Start difference. First operand 644 states and 1763 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:23,466 INFO L93 Difference]: Finished difference Result 681 states and 1835 transitions. [2022-03-15 15:56:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:23,467 INFO L225 Difference]: With dead ends: 681 [2022-03-15 15:56:23,467 INFO L226 Difference]: Without dead ends: 675 [2022-03-15 15:56:23,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:23,468 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:23,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 337 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-15 15:56:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-15 15:56:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 644. [2022-03-15 15:56:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.738724727838258) internal successors, (1761), 643 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1761 transitions. [2022-03-15 15:56:23,474 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1761 transitions. Word has length 19 [2022-03-15 15:56:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:23,474 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1761 transitions. [2022-03-15 15:56:23,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1761 transitions. [2022-03-15 15:56:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:23,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:23,475 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:23,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:23,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-03-15 15:56:23,691 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash 411424571, now seen corresponding path program 530 times [2022-03-15 15:56:23,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:23,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504649704] [2022-03-15 15:56:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:23,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:23,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504649704] [2022-03-15 15:56:23,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504649704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:23,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221937120] [2022-03-15 15:56:23,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:23,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:23,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:23,780 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:23,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-03-15 15:56:23,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:23,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:23,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:23,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:23,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:23,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:24,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:24,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:24,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:24,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:24,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221937120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:24,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:24,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:24,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683378478] [2022-03-15 15:56:24,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:24,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:24,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:24,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:24,079 INFO L87 Difference]: Start difference. First operand 644 states and 1761 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:24,379 INFO L93 Difference]: Finished difference Result 775 states and 2016 transitions. [2022-03-15 15:56:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:56:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:24,380 INFO L225 Difference]: With dead ends: 775 [2022-03-15 15:56:24,380 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 15:56:24,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:24,381 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:24,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 177 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 467 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-03-15 15:56:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 15:56:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 649. [2022-03-15 15:56:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.742283950617284) internal successors, (1777), 648 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1777 transitions. [2022-03-15 15:56:24,387 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1777 transitions. Word has length 19 [2022-03-15 15:56:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1777 transitions. [2022-03-15 15:56:24,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1777 transitions. [2022-03-15 15:56:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:24,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:24,388 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:24,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:24,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2022-03-15 15:56:24,604 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1771541311, now seen corresponding path program 531 times [2022-03-15 15:56:24,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:24,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840163290] [2022-03-15 15:56:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:24,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:24,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:24,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840163290] [2022-03-15 15:56:24,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840163290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:24,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506431849] [2022-03-15 15:56:24,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:24,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:24,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:24,706 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:24,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-03-15 15:56:24,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:24,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:24,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:24,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:24,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:24,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:25,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:25,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:25,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:25,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:25,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506431849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:25,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:25,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:25,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18447552] [2022-03-15 15:56:25,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:25,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:25,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:25,093 INFO L87 Difference]: Start difference. First operand 649 states and 1777 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:25,638 INFO L93 Difference]: Finished difference Result 857 states and 2205 transitions. [2022-03-15 15:56:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:56:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:25,639 INFO L225 Difference]: With dead ends: 857 [2022-03-15 15:56:25,639 INFO L226 Difference]: Without dead ends: 857 [2022-03-15 15:56:25,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:56:25,639 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:25,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 188 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 482 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-03-15 15:56:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-15 15:56:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 661. [2022-03-15 15:56:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.753030303030303) internal successors, (1817), 660 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1817 transitions. [2022-03-15 15:56:25,647 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1817 transitions. Word has length 19 [2022-03-15 15:56:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:25,647 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1817 transitions. [2022-03-15 15:56:25,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1817 transitions. [2022-03-15 15:56:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:25,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:25,648 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:25,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:25,864 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1911278579, now seen corresponding path program 532 times [2022-03-15 15:56:25,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:25,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662331896] [2022-03-15 15:56:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:25,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:25,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:25,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662331896] [2022-03-15 15:56:25,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662331896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:25,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377723880] [2022-03-15 15:56:25,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:25,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:25,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:25,971 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:25,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-03-15 15:56:26,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:26,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:26,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:26,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:26,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:26,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:26,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:26,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:26,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:26,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:26,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:26,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377723880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:26,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:26,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:26,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370123348] [2022-03-15 15:56:26,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:26,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:26,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:26,362 INFO L87 Difference]: Start difference. First operand 661 states and 1817 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:26,707 INFO L93 Difference]: Finished difference Result 804 states and 2096 transitions. [2022-03-15 15:56:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:56:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:26,708 INFO L225 Difference]: With dead ends: 804 [2022-03-15 15:56:26,708 INFO L226 Difference]: Without dead ends: 804 [2022-03-15 15:56:26,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:56:26,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:26,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 154 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 413 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-03-15 15:56:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-15 15:56:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 656. [2022-03-15 15:56:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7465648854961833) internal successors, (1799), 655 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1799 transitions. [2022-03-15 15:56:26,715 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1799 transitions. Word has length 19 [2022-03-15 15:56:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:26,715 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1799 transitions. [2022-03-15 15:56:26,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1799 transitions. [2022-03-15 15:56:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:26,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:26,716 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:26,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:26,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:26,931 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash 276904597, now seen corresponding path program 533 times [2022-03-15 15:56:26,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:26,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808974777] [2022-03-15 15:56:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:27,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808974777] [2022-03-15 15:56:27,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808974777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:27,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511758577] [2022-03-15 15:56:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:27,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:27,002 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:27,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-03-15 15:56:27,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:27,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:27,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:27,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:27,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:27,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:27,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:27,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:27,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511758577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:27,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:27,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:27,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079066367] [2022-03-15 15:56:27,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:27,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:27,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:27,284 INFO L87 Difference]: Start difference. First operand 656 states and 1799 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:27,438 INFO L93 Difference]: Finished difference Result 752 states and 1988 transitions. [2022-03-15 15:56:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:27,440 INFO L225 Difference]: With dead ends: 752 [2022-03-15 15:56:27,440 INFO L226 Difference]: Without dead ends: 752 [2022-03-15 15:56:27,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:27,440 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:27,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 134 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-03-15 15:56:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-15 15:56:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 650. [2022-03-15 15:56:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.741140215716487) internal successors, (1779), 649 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1779 transitions. [2022-03-15 15:56:27,447 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1779 transitions. Word has length 19 [2022-03-15 15:56:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:27,447 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1779 transitions. [2022-03-15 15:56:27,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1779 transitions. [2022-03-15 15:56:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:27,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:27,448 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:27,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Ended with exit code 0 [2022-03-15 15:56:27,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:27,658 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash -107514715, now seen corresponding path program 534 times [2022-03-15 15:56:27,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:27,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291478953] [2022-03-15 15:56:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:27,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:27,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291478953] [2022-03-15 15:56:27,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291478953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:27,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60222885] [2022-03-15 15:56:27,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:27,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:27,756 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:27,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-03-15 15:56:27,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:56:27,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:56:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:28,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:56:28,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:56:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:28,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60222885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:28,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:28,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-15 15:56:28,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924801454] [2022-03-15 15:56:28,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:28,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:28,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:28,092 INFO L87 Difference]: Start difference. First operand 650 states and 1779 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:28,207 INFO L93 Difference]: Finished difference Result 691 states and 1857 transitions. [2022-03-15 15:56:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:56:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:28,208 INFO L225 Difference]: With dead ends: 691 [2022-03-15 15:56:28,208 INFO L226 Difference]: Without dead ends: 681 [2022-03-15 15:56:28,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:28,208 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:28,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 102 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 15:56:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-15 15:56:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 650. [2022-03-15 15:56:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.736517719568567) internal successors, (1776), 649 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1776 transitions. [2022-03-15 15:56:28,215 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1776 transitions. Word has length 19 [2022-03-15 15:56:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:28,215 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1776 transitions. [2022-03-15 15:56:28,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1776 transitions. [2022-03-15 15:56:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:28,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:28,216 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:28,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:28,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:28,423 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1130061167, now seen corresponding path program 535 times [2022-03-15 15:56:28,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:28,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389599993] [2022-03-15 15:56:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:28,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:28,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389599993] [2022-03-15 15:56:28,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389599993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:28,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030824184] [2022-03-15 15:56:28,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:28,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:28,523 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:28,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-03-15 15:56:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:28,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:28,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:28,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:28,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:28,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:28,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:28,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:28,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030824184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:28,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:28,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:28,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420096504] [2022-03-15 15:56:28,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:28,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:28,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:28,855 INFO L87 Difference]: Start difference. First operand 650 states and 1776 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:29,208 INFO L93 Difference]: Finished difference Result 806 states and 2092 transitions. [2022-03-15 15:56:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:56:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:29,209 INFO L225 Difference]: With dead ends: 806 [2022-03-15 15:56:29,210 INFO L226 Difference]: Without dead ends: 806 [2022-03-15 15:56:29,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:29,210 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:29,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 221 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-15 15:56:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 660. [2022-03-15 15:56:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7435508345978756) internal successors, (1808), 659 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1808 transitions. [2022-03-15 15:56:29,217 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1808 transitions. Word has length 19 [2022-03-15 15:56:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:29,217 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1808 transitions. [2022-03-15 15:56:29,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1808 transitions. [2022-03-15 15:56:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:29,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:29,218 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:29,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:29,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:29,433 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1018735369, now seen corresponding path program 536 times [2022-03-15 15:56:29,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:29,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008206270] [2022-03-15 15:56:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:29,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:29,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008206270] [2022-03-15 15:56:29,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008206270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:29,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726463093] [2022-03-15 15:56:29,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:29,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:29,532 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-03-15 15:56:29,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:29,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:29,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:29,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:29,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:29,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:29,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:29,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:29,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:29,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:29,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726463093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:29,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:29,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:29,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287279018] [2022-03-15 15:56:29,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:29,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:29,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:29,804 INFO L87 Difference]: Start difference. First operand 660 states and 1808 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:30,197 INFO L93 Difference]: Finished difference Result 863 states and 2197 transitions. [2022-03-15 15:56:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:56:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:30,199 INFO L225 Difference]: With dead ends: 863 [2022-03-15 15:56:30,199 INFO L226 Difference]: Without dead ends: 863 [2022-03-15 15:56:30,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:30,199 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:30,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 243 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-03-15 15:56:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 661. [2022-03-15 15:56:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.7454545454545456) internal successors, (1812), 660 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1812 transitions. [2022-03-15 15:56:30,222 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1812 transitions. Word has length 19 [2022-03-15 15:56:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:30,222 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1812 transitions. [2022-03-15 15:56:30,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1812 transitions. [2022-03-15 15:56:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:30,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:30,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:30,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:30,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2022-03-15 15:56:30,435 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1983929693, now seen corresponding path program 537 times [2022-03-15 15:56:30,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:30,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432039122] [2022-03-15 15:56:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:30,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:30,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:30,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432039122] [2022-03-15 15:56:30,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432039122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:30,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623879091] [2022-03-15 15:56:30,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:30,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:30,516 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:30,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-03-15 15:56:30,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:30,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:30,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:30,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:30,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:30,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:30,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:30,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:30,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:30,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:30,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623879091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:30,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:30,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:30,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891349460] [2022-03-15 15:56:30,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:30,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:30,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:30,831 INFO L87 Difference]: Start difference. First operand 661 states and 1812 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:31,140 INFO L93 Difference]: Finished difference Result 801 states and 2082 transitions. [2022-03-15 15:56:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:56:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:31,141 INFO L225 Difference]: With dead ends: 801 [2022-03-15 15:56:31,141 INFO L226 Difference]: Without dead ends: 799 [2022-03-15 15:56:31,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:31,141 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:31,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 161 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-15 15:56:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 657. [2022-03-15 15:56:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7439024390243905) internal successors, (1800), 656 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1800 transitions. [2022-03-15 15:56:31,148 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1800 transitions. Word has length 19 [2022-03-15 15:56:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1800 transitions. [2022-03-15 15:56:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1800 transitions. [2022-03-15 15:56:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:31,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:31,149 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:31,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Ended with exit code 0 [2022-03-15 15:56:31,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2022-03-15 15:56:31,349 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash 448600379, now seen corresponding path program 538 times [2022-03-15 15:56:31,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:31,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481442740] [2022-03-15 15:56:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:31,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:31,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:31,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481442740] [2022-03-15 15:56:31,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481442740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:31,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376307880] [2022-03-15 15:56:31,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:31,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:31,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:31,458 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:31,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-03-15 15:56:31,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:31,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:31,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:31,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:31,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:31,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:31,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:31,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:31,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:56:31,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:31,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:56:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:31,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376307880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:31,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:31,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:31,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118954956] [2022-03-15 15:56:31,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:31,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:31,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:31,812 INFO L87 Difference]: Start difference. First operand 657 states and 1800 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:32,214 INFO L93 Difference]: Finished difference Result 798 states and 2063 transitions. [2022-03-15 15:56:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:56:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:32,215 INFO L225 Difference]: With dead ends: 798 [2022-03-15 15:56:32,215 INFO L226 Difference]: Without dead ends: 798 [2022-03-15 15:56:32,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:32,215 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:32,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 248 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 509 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-03-15 15:56:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-03-15 15:56:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 659. [2022-03-15 15:56:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7462006079027357) internal successors, (1807), 658 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1807 transitions. [2022-03-15 15:56:32,222 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:32,222 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1807 transitions. [2022-03-15 15:56:32,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1807 transitions. [2022-03-15 15:56:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:32,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:32,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:32,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:32,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-03-15 15:56:32,424 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1808717119, now seen corresponding path program 539 times [2022-03-15 15:56:32,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:32,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730038779] [2022-03-15 15:56:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:32,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:32,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:32,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730038779] [2022-03-15 15:56:32,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730038779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:32,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771774720] [2022-03-15 15:56:32,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:32,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:32,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:32,525 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:32,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-03-15 15:56:32,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:32,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:32,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:32,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:32,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:32,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:32,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:32,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:32,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:32,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:32,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771774720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:32,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:32,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:32,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017907603] [2022-03-15 15:56:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:32,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:32,787 INFO L87 Difference]: Start difference. First operand 659 states and 1807 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:33,233 INFO L93 Difference]: Finished difference Result 890 states and 2288 transitions. [2022-03-15 15:56:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:56:33,233 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:33,234 INFO L225 Difference]: With dead ends: 890 [2022-03-15 15:56:33,234 INFO L226 Difference]: Without dead ends: 890 [2022-03-15 15:56:33,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:56:33,235 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:33,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 620 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-03-15 15:56:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-15 15:56:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 665. [2022-03-15 15:56:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7560240963855422) internal successors, (1830), 664 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1830 transitions. [2022-03-15 15:56:33,242 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1830 transitions. Word has length 19 [2022-03-15 15:56:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:33,242 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1830 transitions. [2022-03-15 15:56:33,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1830 transitions. [2022-03-15 15:56:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:33,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:33,243 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:33,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:33,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:33,459 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1874102771, now seen corresponding path program 540 times [2022-03-15 15:56:33,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:33,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254312631] [2022-03-15 15:56:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:33,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:33,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254312631] [2022-03-15 15:56:33,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254312631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:33,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211496655] [2022-03-15 15:56:33,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:33,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:33,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:33,557 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:33,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-03-15 15:56:33,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:56:33,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:33,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:33,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:33,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:33,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:33,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:56:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:33,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:33,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:33,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:33,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:33,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:33,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211496655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:33,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:33,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:33,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207746786] [2022-03-15 15:56:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:33,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:33,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:33,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:33,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:33,906 INFO L87 Difference]: Start difference. First operand 665 states and 1830 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:34,241 INFO L93 Difference]: Finished difference Result 766 states and 2053 transitions. [2022-03-15 15:56:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:56:34,241 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:34,242 INFO L225 Difference]: With dead ends: 766 [2022-03-15 15:56:34,242 INFO L226 Difference]: Without dead ends: 766 [2022-03-15 15:56:34,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:34,243 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:34,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 131 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 411 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-03-15 15:56:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-03-15 15:56:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 662. [2022-03-15 15:56:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.750378214826021) internal successors, (1818), 661 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1818 transitions. [2022-03-15 15:56:34,249 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1818 transitions. Word has length 19 [2022-03-15 15:56:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:34,250 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1818 transitions. [2022-03-15 15:56:34,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1818 transitions. [2022-03-15 15:56:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:34,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:34,250 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:34,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:34,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:34,459 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash -908908447, now seen corresponding path program 541 times [2022-03-15 15:56:34,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:34,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046882599] [2022-03-15 15:56:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:34,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:34,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046882599] [2022-03-15 15:56:34,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046882599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:34,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865362392] [2022-03-15 15:56:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:34,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:34,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:34,561 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:34,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-03-15 15:56:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:34,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:34,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:34,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:34,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:34,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:34,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:34,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:34,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:34,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:34,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:34,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865362392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:34,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:34,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:34,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962500410] [2022-03-15 15:56:34,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:34,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:34,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:34,924 INFO L87 Difference]: Start difference. First operand 662 states and 1818 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:35,194 INFO L93 Difference]: Finished difference Result 814 states and 2123 transitions. [2022-03-15 15:56:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:56:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:35,196 INFO L225 Difference]: With dead ends: 814 [2022-03-15 15:56:35,196 INFO L226 Difference]: Without dead ends: 814 [2022-03-15 15:56:35,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:35,196 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:35,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 196 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 476 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-03-15 15:56:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-15 15:56:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 657. [2022-03-15 15:56:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7484756097560976) internal successors, (1803), 656 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1803 transitions. [2022-03-15 15:56:35,203 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1803 transitions. Word has length 19 [2022-03-15 15:56:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:35,203 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1803 transitions. [2022-03-15 15:56:35,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1803 transitions. [2022-03-15 15:56:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:35,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:35,204 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:35,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:35,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:35,419 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash -437197901, now seen corresponding path program 542 times [2022-03-15 15:56:35,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:35,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101321929] [2022-03-15 15:56:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:35,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:35,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101321929] [2022-03-15 15:56:35,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101321929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:35,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806309640] [2022-03-15 15:56:35,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:35,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:35,516 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:35,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-03-15 15:56:35,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:35,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:35,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:35,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:35,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:35,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:35,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:35,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:35,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:35,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:35,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:35,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:35,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806309640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:35,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:35,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:35,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26930167] [2022-03-15 15:56:35,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:35,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:35,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:35,919 INFO L87 Difference]: Start difference. First operand 657 states and 1803 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:36,255 INFO L93 Difference]: Finished difference Result 761 states and 1981 transitions. [2022-03-15 15:56:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:56:36,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:36,257 INFO L225 Difference]: With dead ends: 761 [2022-03-15 15:56:36,257 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 15:56:36,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:36,257 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:36,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 256 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 593 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-15 15:56:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 15:56:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 654. [2022-03-15 15:56:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.7427258805513017) internal successors, (1791), 653 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1791 transitions. [2022-03-15 15:56:36,264 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1791 transitions. Word has length 19 [2022-03-15 15:56:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:36,264 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1791 transitions. [2022-03-15 15:56:36,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1791 transitions. [2022-03-15 15:56:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:36,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:36,264 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:36,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Ended with exit code 0 [2022-03-15 15:56:36,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-03-15 15:56:36,465 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 922918839, now seen corresponding path program 543 times [2022-03-15 15:56:36,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:36,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003954500] [2022-03-15 15:56:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:36,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:36,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003954500] [2022-03-15 15:56:36,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003954500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:36,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742056739] [2022-03-15 15:56:36,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:36,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:36,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:36,571 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:36,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-03-15 15:56:36,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:36,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:36,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:36,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:36,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:36,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:36,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:36,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:36,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:36,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:36,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:36,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742056739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:36,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:36,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:36,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061262006] [2022-03-15 15:56:36,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:36,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:36,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:36,955 INFO L87 Difference]: Start difference. First operand 654 states and 1791 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:37,423 INFO L93 Difference]: Finished difference Result 800 states and 2082 transitions. [2022-03-15 15:56:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:37,424 INFO L225 Difference]: With dead ends: 800 [2022-03-15 15:56:37,424 INFO L226 Difference]: Without dead ends: 800 [2022-03-15 15:56:37,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:37,425 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:37,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 183 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 411 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-03-15 15:56:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-03-15 15:56:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 663. [2022-03-15 15:56:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7522658610271904) internal successors, (1822), 662 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1822 transitions. [2022-03-15 15:56:37,432 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1822 transitions. Word has length 19 [2022-03-15 15:56:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:37,432 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1822 transitions. [2022-03-15 15:56:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1822 transitions. [2022-03-15 15:56:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:37,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:37,433 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:37,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Ended with exit code 0 [2022-03-15 15:56:37,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2022-03-15 15:56:37,633 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1535066245, now seen corresponding path program 544 times [2022-03-15 15:56:37,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:37,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802535544] [2022-03-15 15:56:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:37,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:37,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802535544] [2022-03-15 15:56:37,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802535544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:37,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068049164] [2022-03-15 15:56:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:37,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:37,738 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-03-15 15:56:37,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:37,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:37,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:37,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:37,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:37,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:38,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:38,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:38,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:38,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068049164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:38,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:38,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:38,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455261452] [2022-03-15 15:56:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:38,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:38,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:38,131 INFO L87 Difference]: Start difference. First operand 663 states and 1822 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:38,333 INFO L93 Difference]: Finished difference Result 723 states and 1928 transitions. [2022-03-15 15:56:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:38,334 INFO L225 Difference]: With dead ends: 723 [2022-03-15 15:56:38,334 INFO L226 Difference]: Without dead ends: 723 [2022-03-15 15:56:38,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:38,334 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:38,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 105 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 265 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-03-15 15:56:38,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-03-15 15:56:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 663. [2022-03-15 15:56:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7447129909365557) internal successors, (1817), 662 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1817 transitions. [2022-03-15 15:56:38,341 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1817 transitions. Word has length 19 [2022-03-15 15:56:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:38,341 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1817 transitions. [2022-03-15 15:56:38,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1817 transitions. [2022-03-15 15:56:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:38,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:38,342 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:38,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Ended with exit code 0 [2022-03-15 15:56:38,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:38,555 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1543882509, now seen corresponding path program 545 times [2022-03-15 15:56:38,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:38,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637216857] [2022-03-15 15:56:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:38,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637216857] [2022-03-15 15:56:38,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637216857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:38,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298236200] [2022-03-15 15:56:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:38,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:38,665 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:38,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-03-15 15:56:38,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:38,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:38,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:56:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:38,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:56:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:38,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:38,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:38,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:38,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298236200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:39,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:39,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:39,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154579637] [2022-03-15 15:56:39,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:39,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:39,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:39,003 INFO L87 Difference]: Start difference. First operand 663 states and 1817 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:39,236 INFO L93 Difference]: Finished difference Result 699 states and 1887 transitions. [2022-03-15 15:56:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:56:39,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:39,238 INFO L225 Difference]: With dead ends: 699 [2022-03-15 15:56:39,238 INFO L226 Difference]: Without dead ends: 693 [2022-03-15 15:56:39,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:39,238 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:39,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-03-15 15:56:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-03-15 15:56:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 663. [2022-03-15 15:56:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7416918429003023) internal successors, (1815), 662 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1815 transitions. [2022-03-15 15:56:39,244 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1815 transitions. Word has length 19 [2022-03-15 15:56:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:39,244 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1815 transitions. [2022-03-15 15:56:39,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1815 transitions. [2022-03-15 15:56:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:39,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:39,245 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:39,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Ended with exit code 0 [2022-03-15 15:56:39,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable550 [2022-03-15 15:56:39,461 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash -571717875, now seen corresponding path program 546 times [2022-03-15 15:56:39,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:39,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948983265] [2022-03-15 15:56:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:39,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:39,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948983265] [2022-03-15 15:56:39,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948983265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:39,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107291401] [2022-03-15 15:56:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:39,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:39,543 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:39,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-03-15 15:56:39,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:39,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:39,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:39,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:39,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:39,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:39,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:39,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:39,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:39,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:39,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:39,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107291401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:39,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:39,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:39,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556763429] [2022-03-15 15:56:39,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:39,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:39,855 INFO L87 Difference]: Start difference. First operand 663 states and 1815 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:40,025 INFO L93 Difference]: Finished difference Result 746 states and 1969 transitions. [2022-03-15 15:56:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:56:40,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:40,027 INFO L225 Difference]: With dead ends: 746 [2022-03-15 15:56:40,027 INFO L226 Difference]: Without dead ends: 746 [2022-03-15 15:56:40,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:40,027 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:40,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 148 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 421 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-03-15 15:56:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-15 15:56:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 658. [2022-03-15 15:56:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.7351598173515983) internal successors, (1797), 657 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1797 transitions. [2022-03-15 15:56:40,034 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1797 transitions. Word has length 19 [2022-03-15 15:56:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:40,034 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1797 transitions. [2022-03-15 15:56:40,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1797 transitions. [2022-03-15 15:56:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:40,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:40,035 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:40,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Ended with exit code 0 [2022-03-15 15:56:40,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2022-03-15 15:56:40,251 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 631177361, now seen corresponding path program 547 times [2022-03-15 15:56:40,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:40,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639527321] [2022-03-15 15:56:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:40,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:40,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639527321] [2022-03-15 15:56:40,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639527321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:40,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741863896] [2022-03-15 15:56:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:40,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:40,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:40,385 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:40,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-03-15 15:56:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:40,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:40,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:40,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:40,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:40,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:40,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:40,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:40,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:40,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:40,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:40,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:40,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741863896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:40,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:40,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:40,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10382510] [2022-03-15 15:56:40,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:40,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:40,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:40,786 INFO L87 Difference]: Start difference. First operand 658 states and 1797 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:41,102 INFO L93 Difference]: Finished difference Result 742 states and 1949 transitions. [2022-03-15 15:56:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:56:41,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:41,103 INFO L225 Difference]: With dead ends: 742 [2022-03-15 15:56:41,103 INFO L226 Difference]: Without dead ends: 742 [2022-03-15 15:56:41,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:41,104 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:41,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 166 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 382 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-03-15 15:56:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-15 15:56:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 663. [2022-03-15 15:56:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7371601208459215) internal successors, (1812), 662 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1812 transitions. [2022-03-15 15:56:41,110 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1812 transitions. Word has length 19 [2022-03-15 15:56:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:41,111 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1812 transitions. [2022-03-15 15:56:41,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1812 transitions. [2022-03-15 15:56:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:41,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:41,111 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:41,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:41,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2022-03-15 15:56:41,327 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash -236272287, now seen corresponding path program 548 times [2022-03-15 15:56:41,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:41,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108378169] [2022-03-15 15:56:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:41,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:41,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108378169] [2022-03-15 15:56:41,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108378169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:41,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071482812] [2022-03-15 15:56:41,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:41,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:41,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:41,400 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:41,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-03-15 15:56:41,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:41,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:41,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:41,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:41,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:41,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:41,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:41,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:41,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:41,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071482812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:41,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:41,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:41,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996525058] [2022-03-15 15:56:41,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:41,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:41,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:41,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:41,668 INFO L87 Difference]: Start difference. First operand 663 states and 1812 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:41,953 INFO L93 Difference]: Finished difference Result 750 states and 1965 transitions. [2022-03-15 15:56:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:56:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:41,955 INFO L225 Difference]: With dead ends: 750 [2022-03-15 15:56:41,955 INFO L226 Difference]: Without dead ends: 744 [2022-03-15 15:56:41,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:41,955 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:41,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 189 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 366 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2022-03-15 15:56:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-15 15:56:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 663. [2022-03-15 15:56:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7341389728096677) internal successors, (1810), 662 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1810 transitions. [2022-03-15 15:56:41,962 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1810 transitions. Word has length 19 [2022-03-15 15:56:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:41,962 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1810 transitions. [2022-03-15 15:56:41,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1810 transitions. [2022-03-15 15:56:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:41,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:41,962 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:41,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:42,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2022-03-15 15:56:42,178 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1991294101, now seen corresponding path program 549 times [2022-03-15 15:56:42,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:42,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751445846] [2022-03-15 15:56:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:42,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:42,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751445846] [2022-03-15 15:56:42,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751445846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:42,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581569524] [2022-03-15 15:56:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:42,250 INFO L229 MonitoredProcess]: Starting monitored process 550 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:42,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-03-15 15:56:42,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:42,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:42,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:42,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:42,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:42,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:42,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:42,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:42,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:42,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:42,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581569524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:42,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:42,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:42,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627317118] [2022-03-15 15:56:42,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:42,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:42,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:42,551 INFO L87 Difference]: Start difference. First operand 663 states and 1810 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:43,088 INFO L93 Difference]: Finished difference Result 777 states and 2033 transitions. [2022-03-15 15:56:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:56:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:43,089 INFO L225 Difference]: With dead ends: 777 [2022-03-15 15:56:43,090 INFO L226 Difference]: Without dead ends: 777 [2022-03-15 15:56:43,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:56:43,090 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:43,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 246 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 778 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-15 15:56:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-03-15 15:56:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 666. [2022-03-15 15:56:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.736842105263158) internal successors, (1820), 665 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1820 transitions. [2022-03-15 15:56:43,097 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1820 transitions. Word has length 19 [2022-03-15 15:56:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:43,097 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1820 transitions. [2022-03-15 15:56:43,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1820 transitions. [2022-03-15 15:56:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:43,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:43,097 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:43,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:43,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2022-03-15 15:56:43,313 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1596371685, now seen corresponding path program 550 times [2022-03-15 15:56:43,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:43,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775056805] [2022-03-15 15:56:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:43,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:43,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:43,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775056805] [2022-03-15 15:56:43,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775056805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:43,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87109603] [2022-03-15 15:56:43,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:43,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:43,405 INFO L229 MonitoredProcess]: Starting monitored process 551 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:43,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-03-15 15:56:43,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:43,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:43,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:43,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:43,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:43,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:43,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:43,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:43,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:43,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87109603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:43,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:43,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:43,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284023267] [2022-03-15 15:56:43,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:43,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:43,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:43,707 INFO L87 Difference]: Start difference. First operand 666 states and 1820 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:44,086 INFO L93 Difference]: Finished difference Result 742 states and 1955 transitions. [2022-03-15 15:56:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:44,088 INFO L225 Difference]: With dead ends: 742 [2022-03-15 15:56:44,088 INFO L226 Difference]: Without dead ends: 740 [2022-03-15 15:56:44,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:44,088 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:44,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 201 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 454 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-03-15 15:56:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-15 15:56:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 665. [2022-03-15 15:56:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.73644578313253) internal successors, (1817), 664 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1817 transitions. [2022-03-15 15:56:44,094 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1817 transitions. Word has length 19 [2022-03-15 15:56:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:44,094 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1817 transitions. [2022-03-15 15:56:44,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1817 transitions. [2022-03-15 15:56:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:44,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:44,095 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:44,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:44,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2022-03-15 15:56:44,310 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash -154876659, now seen corresponding path program 551 times [2022-03-15 15:56:44,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:44,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288041682] [2022-03-15 15:56:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:44,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:44,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288041682] [2022-03-15 15:56:44,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288041682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:44,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594271118] [2022-03-15 15:56:44,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:44,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:44,418 INFO L229 MonitoredProcess]: Starting monitored process 552 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:44,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-03-15 15:56:44,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:44,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:44,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:44,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:44,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:44,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:44,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:44,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:44,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:44,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:44,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:44,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:44,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594271118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:44,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:44,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:44,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683957031] [2022-03-15 15:56:44,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:44,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:44,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:44,719 INFO L87 Difference]: Start difference. First operand 665 states and 1817 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:45,079 INFO L93 Difference]: Finished difference Result 756 states and 1991 transitions. [2022-03-15 15:56:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:56:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:45,080 INFO L225 Difference]: With dead ends: 756 [2022-03-15 15:56:45,080 INFO L226 Difference]: Without dead ends: 756 [2022-03-15 15:56:45,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:56:45,080 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:45,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 254 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 575 Invalid, 0 Unknown, 232 Unchecked, 0.1s Time] [2022-03-15 15:56:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-03-15 15:56:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 663. [2022-03-15 15:56:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7371601208459215) internal successors, (1812), 662 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1812 transitions. [2022-03-15 15:56:45,087 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1812 transitions. Word has length 19 [2022-03-15 15:56:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:45,087 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1812 transitions. [2022-03-15 15:56:45,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1812 transitions. [2022-03-15 15:56:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:45,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:45,087 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:45,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:45,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2022-03-15 15:56:45,303 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2033306517, now seen corresponding path program 552 times [2022-03-15 15:56:45,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:45,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466449252] [2022-03-15 15:56:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:45,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:45,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466449252] [2022-03-15 15:56:45,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466449252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:45,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636884977] [2022-03-15 15:56:45,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:45,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:45,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:45,371 INFO L229 MonitoredProcess]: Starting monitored process 553 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:45,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-03-15 15:56:45,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:45,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:45,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:45,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:45,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:56:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:45,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:45,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:45,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:45,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:45,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:45,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636884977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:45,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:45,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:45,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491121093] [2022-03-15 15:56:45,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:45,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:45,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:45,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:45,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:45,638 INFO L87 Difference]: Start difference. First operand 663 states and 1812 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:45,840 INFO L93 Difference]: Finished difference Result 749 states and 1985 transitions. [2022-03-15 15:56:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:45,841 INFO L225 Difference]: With dead ends: 749 [2022-03-15 15:56:45,841 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 15:56:45,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:45,841 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:45,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 144 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 425 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-03-15 15:56:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 15:56:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 661. [2022-03-15 15:56:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.737878787878788) internal successors, (1807), 660 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1807 transitions. [2022-03-15 15:56:45,848 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1807 transitions. Word has length 19 [2022-03-15 15:56:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:45,848 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1807 transitions. [2022-03-15 15:56:45,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1807 transitions. [2022-03-15 15:56:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:45,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:45,849 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:45,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:46,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2022-03-15 15:56:46,064 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1147508237, now seen corresponding path program 553 times [2022-03-15 15:56:46,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:46,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442891658] [2022-03-15 15:56:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:46,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:46,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442891658] [2022-03-15 15:56:46,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442891658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:46,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966187154] [2022-03-15 15:56:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:46,130 INFO L229 MonitoredProcess]: Starting monitored process 554 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:46,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-03-15 15:56:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:46,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:46,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:46,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:46,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:46,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:46,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:46,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:46,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:46,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966187154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:46,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:46,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:46,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921386998] [2022-03-15 15:56:46,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:46,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:46,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:46,396 INFO L87 Difference]: Start difference. First operand 661 states and 1807 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:46,469 INFO L93 Difference]: Finished difference Result 711 states and 1918 transitions. [2022-03-15 15:56:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:46,470 INFO L225 Difference]: With dead ends: 711 [2022-03-15 15:56:46,470 INFO L226 Difference]: Without dead ends: 711 [2022-03-15 15:56:46,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:46,470 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:46,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-15 15:56:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-15 15:56:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 666. [2022-03-15 15:56:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.73984962406015) internal successors, (1822), 665 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1822 transitions. [2022-03-15 15:56:46,477 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1822 transitions. Word has length 19 [2022-03-15 15:56:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:46,477 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1822 transitions. [2022-03-15 15:56:46,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1822 transitions. [2022-03-15 15:56:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:46,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:46,477 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:46,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:46,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558,554 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:46,694 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2112702561, now seen corresponding path program 554 times [2022-03-15 15:56:46,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:46,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492989496] [2022-03-15 15:56:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:46,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:46,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:46,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492989496] [2022-03-15 15:56:46,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492989496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:46,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801335946] [2022-03-15 15:56:46,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:46,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:46,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:46,767 INFO L229 MonitoredProcess]: Starting monitored process 555 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:46,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-03-15 15:56:46,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:46,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:46,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:46,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:46,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:46,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:47,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:47,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:47,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801335946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:47,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:47,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 15:56:47,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568028816] [2022-03-15 15:56:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:47,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:47,044 INFO L87 Difference]: Start difference. First operand 666 states and 1822 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:47,112 INFO L93 Difference]: Finished difference Result 720 states and 1930 transitions. [2022-03-15 15:56:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:47,113 INFO L225 Difference]: With dead ends: 720 [2022-03-15 15:56:47,113 INFO L226 Difference]: Without dead ends: 720 [2022-03-15 15:56:47,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:47,113 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:47,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 126 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-03-15 15:56:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-03-15 15:56:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 664. [2022-03-15 15:56:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.7390648567119156) internal successors, (1816), 663 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1816 transitions. [2022-03-15 15:56:47,120 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1816 transitions. Word has length 19 [2022-03-15 15:56:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:47,120 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1816 transitions. [2022-03-15 15:56:47,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1816 transitions. [2022-03-15 15:56:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:47,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:47,121 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:47,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:47,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,555 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:47,327 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1577472759, now seen corresponding path program 555 times [2022-03-15 15:56:47,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:47,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511012526] [2022-03-15 15:56:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:47,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:47,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511012526] [2022-03-15 15:56:47,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511012526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:47,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265925042] [2022-03-15 15:56:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:47,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:47,426 INFO L229 MonitoredProcess]: Starting monitored process 556 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:47,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-03-15 15:56:47,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:47,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:47,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:47,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:47,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:47,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:47,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:47,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:47,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:47,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265925042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:47,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:47,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 15:56:47,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392689284] [2022-03-15 15:56:47,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:47,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:47,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:47,769 INFO L87 Difference]: Start difference. First operand 664 states and 1816 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:47,851 INFO L93 Difference]: Finished difference Result 731 states and 1951 transitions. [2022-03-15 15:56:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:47,851 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:47,852 INFO L225 Difference]: With dead ends: 731 [2022-03-15 15:56:47,852 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 15:56:47,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:47,853 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:47,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 138 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2022-03-15 15:56:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 15:56:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 665. [2022-03-15 15:56:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7394578313253013) internal successors, (1819), 664 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1819 transitions. [2022-03-15 15:56:47,859 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1819 transitions. Word has length 19 [2022-03-15 15:56:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:47,859 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1819 transitions. [2022-03-15 15:56:47,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1819 transitions. [2022-03-15 15:56:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:47,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:47,860 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:47,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:48,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable560 [2022-03-15 15:56:48,075 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1605844293, now seen corresponding path program 556 times [2022-03-15 15:56:48,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:48,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517949275] [2022-03-15 15:56:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:48,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:48,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517949275] [2022-03-15 15:56:48,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517949275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:48,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005312348] [2022-03-15 15:56:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:48,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:48,145 INFO L229 MonitoredProcess]: Starting monitored process 557 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:48,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-03-15 15:56:48,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:48,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:48,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:48,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:56:48,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:48,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:56:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:48,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:48,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:56:48,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:48,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:56:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005312348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:48,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:48,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-15 15:56:48,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157641698] [2022-03-15 15:56:48,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:48,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:48,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:48,390 INFO L87 Difference]: Start difference. First operand 665 states and 1819 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:48,489 INFO L93 Difference]: Finished difference Result 709 states and 1901 transitions. [2022-03-15 15:56:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:56:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:48,490 INFO L225 Difference]: With dead ends: 709 [2022-03-15 15:56:48,490 INFO L226 Difference]: Without dead ends: 695 [2022-03-15 15:56:48,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:48,490 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:48,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-03-15 15:56:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-15 15:56:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 665. [2022-03-15 15:56:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.73644578313253) internal successors, (1817), 664 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1817 transitions. [2022-03-15 15:56:48,496 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1817 transitions. Word has length 19 [2022-03-15 15:56:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:48,496 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1817 transitions. [2022-03-15 15:56:48,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1817 transitions. [2022-03-15 15:56:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:48,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:48,497 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:48,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:48,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,557 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:48,713 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash 345556411, now seen corresponding path program 557 times [2022-03-15 15:56:48,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:48,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128509433] [2022-03-15 15:56:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:48,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:48,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128509433] [2022-03-15 15:56:48,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128509433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:48,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291247003] [2022-03-15 15:56:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:48,796 INFO L229 MonitoredProcess]: Starting monitored process 558 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:48,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-03-15 15:56:48,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:56:48,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:48,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:48,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:48,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:49,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:49,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:49,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:49,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291247003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:49,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:49,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:49,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201333305] [2022-03-15 15:56:49,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:49,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:49,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:49,059 INFO L87 Difference]: Start difference. First operand 665 states and 1817 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:49,482 INFO L93 Difference]: Finished difference Result 838 states and 2165 transitions. [2022-03-15 15:56:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:56:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:49,484 INFO L225 Difference]: With dead ends: 838 [2022-03-15 15:56:49,484 INFO L226 Difference]: Without dead ends: 838 [2022-03-15 15:56:49,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:49,484 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:49,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 312 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:49,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-15 15:56:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 667. [2022-03-15 15:56:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.74024024024024) internal successors, (1825), 666 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1825 transitions. [2022-03-15 15:56:49,491 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1825 transitions. Word has length 19 [2022-03-15 15:56:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:49,491 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1825 transitions. [2022-03-15 15:56:49,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1825 transitions. [2022-03-15 15:56:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:49,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:49,492 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:49,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:49,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2022-03-15 15:56:49,707 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1800614349, now seen corresponding path program 558 times [2022-03-15 15:56:49,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:49,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541857412] [2022-03-15 15:56:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:49,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:49,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541857412] [2022-03-15 15:56:49,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541857412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:49,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656487797] [2022-03-15 15:56:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:49,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:49,791 INFO L229 MonitoredProcess]: Starting monitored process 559 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:49,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-03-15 15:56:49,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:56:49,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:49,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:49,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:49,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:49,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:50,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:50,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:50,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:50,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656487797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:50,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:50,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:50,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829672091] [2022-03-15 15:56:50,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:50,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:50,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:50,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:50,058 INFO L87 Difference]: Start difference. First operand 667 states and 1825 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:50,492 INFO L93 Difference]: Finished difference Result 887 states and 2261 transitions. [2022-03-15 15:56:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:56:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:50,494 INFO L225 Difference]: With dead ends: 887 [2022-03-15 15:56:50,494 INFO L226 Difference]: Without dead ends: 887 [2022-03-15 15:56:50,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:50,494 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:50,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 226 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-15 15:56:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 668. [2022-03-15 15:56:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.742128935532234) internal successors, (1829), 667 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1829 transitions. [2022-03-15 15:56:50,501 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1829 transitions. Word has length 19 [2022-03-15 15:56:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:50,502 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1829 transitions. [2022-03-15 15:56:50,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1829 transitions. [2022-03-15 15:56:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:50,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:50,502 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:50,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Ended with exit code 0 [2022-03-15 15:56:50,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2022-03-15 15:56:50,718 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -835420025, now seen corresponding path program 559 times [2022-03-15 15:56:50,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:50,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447695372] [2022-03-15 15:56:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:50,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447695372] [2022-03-15 15:56:50,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447695372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:50,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734383148] [2022-03-15 15:56:50,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:50,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:50,817 INFO L229 MonitoredProcess]: Starting monitored process 560 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:50,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-03-15 15:56:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:50,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:50,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:50,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:50,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:51,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:51,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:51,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:51,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:51,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734383148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:51,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:51,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:56:51,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475928247] [2022-03-15 15:56:51,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:51,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:56:51,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:51,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:56:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:51,068 INFO L87 Difference]: Start difference. First operand 668 states and 1829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:51,499 INFO L93 Difference]: Finished difference Result 845 states and 2181 transitions. [2022-03-15 15:56:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:56:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:51,500 INFO L225 Difference]: With dead ends: 845 [2022-03-15 15:56:51,500 INFO L226 Difference]: Without dead ends: 843 [2022-03-15 15:56:51,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:51,500 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:51,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 220 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-03-15 15:56:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 665. [2022-03-15 15:56:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7409638554216866) internal successors, (1820), 664 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1820 transitions. [2022-03-15 15:56:51,507 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1820 transitions. Word has length 19 [2022-03-15 15:56:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:51,507 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1820 transitions. [2022-03-15 15:56:51,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1820 transitions. [2022-03-15 15:56:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:51,508 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:51,508 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:51,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:51,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2022-03-15 15:56:51,708 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1924217957, now seen corresponding path program 560 times [2022-03-15 15:56:51,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:51,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606149618] [2022-03-15 15:56:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:51,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:51,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:51,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606149618] [2022-03-15 15:56:51,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606149618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:51,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446850689] [2022-03-15 15:56:51,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:51,827 INFO L229 MonitoredProcess]: Starting monitored process 561 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:51,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-03-15 15:56:51,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:51,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:51,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:51,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:51,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:52,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:52,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:52,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:56:52,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:52,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:56:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:52,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446850689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:52,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:52,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:52,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201162132] [2022-03-15 15:56:52,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:52,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:52,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:52,183 INFO L87 Difference]: Start difference. First operand 665 states and 1820 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:52,739 INFO L93 Difference]: Finished difference Result 841 states and 2159 transitions. [2022-03-15 15:56:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:56:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:52,741 INFO L225 Difference]: With dead ends: 841 [2022-03-15 15:56:52,741 INFO L226 Difference]: Without dead ends: 841 [2022-03-15 15:56:52,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:52,741 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:52,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 311 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 869 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-03-15 15:56:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-15 15:56:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 665. [2022-03-15 15:56:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7409638554216866) internal successors, (1820), 664 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1820 transitions. [2022-03-15 15:56:52,748 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1820 transitions. Word has length 19 [2022-03-15 15:56:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:52,748 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1820 transitions. [2022-03-15 15:56:52,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1820 transitions. [2022-03-15 15:56:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:52,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:52,749 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:52,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Ended with exit code 0 [2022-03-15 15:56:52,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2022-03-15 15:56:52,949 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:52,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1010632599, now seen corresponding path program 561 times [2022-03-15 15:56:52,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:52,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171481684] [2022-03-15 15:56:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:52,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:53,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:53,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171481684] [2022-03-15 15:56:53,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171481684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:53,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678557846] [2022-03-15 15:56:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:53,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:53,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:53,052 INFO L229 MonitoredProcess]: Starting monitored process 562 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:53,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-03-15 15:56:53,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:53,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:53,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:53,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:53,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:53,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:53,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:53,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:53,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:53,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:53,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678557846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:53,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:53,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:56:53,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700099564] [2022-03-15 15:56:53,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:53,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:53,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:53,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:53,372 INFO L87 Difference]: Start difference. First operand 665 states and 1820 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:54,045 INFO L93 Difference]: Finished difference Result 929 states and 2381 transitions. [2022-03-15 15:56:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:56:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:54,047 INFO L225 Difference]: With dead ends: 929 [2022-03-15 15:56:54,047 INFO L226 Difference]: Without dead ends: 929 [2022-03-15 15:56:54,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:56:54,048 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:54,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 214 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 659 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-03-15 15:56:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-03-15 15:56:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 672. [2022-03-15 15:56:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 2.7481371087928466) internal successors, (1844), 671 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1844 transitions. [2022-03-15 15:56:54,056 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1844 transitions. Word has length 19 [2022-03-15 15:56:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:54,056 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1844 transitions. [2022-03-15 15:56:54,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1844 transitions. [2022-03-15 15:56:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:54,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:54,057 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:54,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:54,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,562 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:54,257 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash -398485193, now seen corresponding path program 562 times [2022-03-15 15:56:54,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:54,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786798444] [2022-03-15 15:56:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:54,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:54,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786798444] [2022-03-15 15:56:54,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786798444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:54,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142021741] [2022-03-15 15:56:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:54,365 INFO L229 MonitoredProcess]: Starting monitored process 563 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:54,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-03-15 15:56:54,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:54,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:54,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:54,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:54,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:56:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:54,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:54,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:54,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:54,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142021741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:54,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:54,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:54,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134434152] [2022-03-15 15:56:54,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:54,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:54,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:54,690 INFO L87 Difference]: Start difference. First operand 672 states and 1844 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:55,060 INFO L93 Difference]: Finished difference Result 861 states and 2233 transitions. [2022-03-15 15:56:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:56:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:55,062 INFO L225 Difference]: With dead ends: 861 [2022-03-15 15:56:55,062 INFO L226 Difference]: Without dead ends: 861 [2022-03-15 15:56:55,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:55,062 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:55,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 223 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 560 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-03-15 15:56:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-03-15 15:56:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 666. [2022-03-15 15:56:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.742857142857143) internal successors, (1824), 665 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1824 transitions. [2022-03-15 15:56:55,069 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1824 transitions. Word has length 19 [2022-03-15 15:56:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:55,069 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1824 transitions. [2022-03-15 15:56:55,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1824 transitions. [2022-03-15 15:56:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:55,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:55,070 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:55,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:55,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2022-03-15 15:56:55,286 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1038419677, now seen corresponding path program 563 times [2022-03-15 15:56:55,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:55,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209583126] [2022-03-15 15:56:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:55,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209583126] [2022-03-15 15:56:55,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209583126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:55,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164650993] [2022-03-15 15:56:55,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:55,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:55,412 INFO L229 MonitoredProcess]: Starting monitored process 564 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:55,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Waiting until timeout for monitored process [2022-03-15 15:56:55,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:55,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:56:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:55,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:55,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:56:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:55,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:56:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:55,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:55,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:56:55,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:55,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:56:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164650993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:55,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:55,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:55,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643783928] [2022-03-15 15:56:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:55,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:55,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:55,760 INFO L87 Difference]: Start difference. First operand 666 states and 1824 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:56,151 INFO L93 Difference]: Finished difference Result 815 states and 2100 transitions. [2022-03-15 15:56:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:56,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:56,152 INFO L225 Difference]: With dead ends: 815 [2022-03-15 15:56:56,152 INFO L226 Difference]: Without dead ends: 815 [2022-03-15 15:56:56,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:56,152 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:56,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 236 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 572 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-03-15 15:56:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-15 15:56:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 663. [2022-03-15 15:56:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7371601208459215) internal successors, (1812), 662 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1812 transitions. [2022-03-15 15:56:56,159 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1812 transitions. Word has length 19 [2022-03-15 15:56:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:56,159 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1812 transitions. [2022-03-15 15:56:56,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1812 transitions. [2022-03-15 15:56:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:56,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:56,160 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:56,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Ended with exit code 0 [2022-03-15 15:56:56,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,564 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:56,376 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1896430879, now seen corresponding path program 564 times [2022-03-15 15:56:56,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:56,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336490933] [2022-03-15 15:56:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:56,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336490933] [2022-03-15 15:56:56,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336490933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:56,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317864045] [2022-03-15 15:56:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:56,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:56,517 INFO L229 MonitoredProcess]: Starting monitored process 565 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:56,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Waiting until timeout for monitored process [2022-03-15 15:56:56,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:56:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:56,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:56,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:56:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:56,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:56:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:56,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:56,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:56,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:56,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317864045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:56,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:56,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:56,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463834539] [2022-03-15 15:56:56,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:56,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:56,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:56,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:56,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:56,911 INFO L87 Difference]: Start difference. First operand 663 states and 1812 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:57,456 INFO L93 Difference]: Finished difference Result 851 states and 2187 transitions. [2022-03-15 15:56:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:56:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:57,457 INFO L225 Difference]: With dead ends: 851 [2022-03-15 15:56:57,457 INFO L226 Difference]: Without dead ends: 851 [2022-03-15 15:56:57,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:57,458 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:57,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 301 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 826 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-03-15 15:56:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-15 15:56:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 663. [2022-03-15 15:56:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7356495468277946) internal successors, (1811), 662 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1811 transitions. [2022-03-15 15:56:57,465 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1811 transitions. Word has length 19 [2022-03-15 15:56:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:57,465 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1811 transitions. [2022-03-15 15:56:57,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1811 transitions. [2022-03-15 15:56:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:57,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:57,466 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:57,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:57,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 565 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2022-03-15 15:56:57,666 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1284283473, now seen corresponding path program 565 times [2022-03-15 15:56:57,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:57,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319320060] [2022-03-15 15:56:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:57,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:57,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319320060] [2022-03-15 15:56:57,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319320060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:57,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643051781] [2022-03-15 15:56:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:57,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:57,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:57,771 INFO L229 MonitoredProcess]: Starting monitored process 566 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:57,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Waiting until timeout for monitored process [2022-03-15 15:56:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:57,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:57,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:57,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:57,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:56:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:57,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:58,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:58,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:58,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:58,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:56:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643051781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:58,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:58,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:58,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360439365] [2022-03-15 15:56:58,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:58,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:58,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:58,131 INFO L87 Difference]: Start difference. First operand 663 states and 1811 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:58,443 INFO L93 Difference]: Finished difference Result 745 states and 1988 transitions. [2022-03-15 15:56:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:56:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:58,444 INFO L225 Difference]: With dead ends: 745 [2022-03-15 15:56:58,444 INFO L226 Difference]: Without dead ends: 745 [2022-03-15 15:56:58,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:58,445 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 149 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 409 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-03-15 15:56:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-03-15 15:56:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 664. [2022-03-15 15:56:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.73604826546003) internal successors, (1814), 663 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1814 transitions. [2022-03-15 15:56:58,451 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1814 transitions. Word has length 19 [2022-03-15 15:56:58,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:58,451 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1814 transitions. [2022-03-15 15:56:58,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1814 transitions. [2022-03-15 15:56:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:58,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:58,452 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:58,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:58,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,566 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:58,652 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -319089149, now seen corresponding path program 566 times [2022-03-15 15:56:58,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:58,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810171966] [2022-03-15 15:56:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:58,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810171966] [2022-03-15 15:56:58,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810171966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:58,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585321489] [2022-03-15 15:56:58,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:58,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:58,754 INFO L229 MonitoredProcess]: Starting monitored process 567 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:58,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Waiting until timeout for monitored process [2022-03-15 15:56:58,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:56:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:58,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:58,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:56:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:58,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:56:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:59,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:59,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:56:59,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:59,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:56:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:59,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585321489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:59,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:59,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:56:59,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976354040] [2022-03-15 15:56:59,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:59,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:59,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:59,144 INFO L87 Difference]: Start difference. First operand 664 states and 1814 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:59,627 INFO L93 Difference]: Finished difference Result 811 states and 2097 transitions. [2022-03-15 15:56:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:56:59,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:56:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:59,628 INFO L225 Difference]: With dead ends: 811 [2022-03-15 15:56:59,628 INFO L226 Difference]: Without dead ends: 811 [2022-03-15 15:56:59,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:56:59,628 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:59,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 244 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 655 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-03-15 15:56:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-03-15 15:56:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 661. [2022-03-15 15:56:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.731818181818182) internal successors, (1803), 660 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1803 transitions. [2022-03-15 15:56:59,641 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1803 transitions. Word has length 19 [2022-03-15 15:56:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:59,641 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1803 transitions. [2022-03-15 15:56:59,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1803 transitions. [2022-03-15 15:56:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:56:59,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:59,642 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:59,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Ended with exit code 0 [2022-03-15 15:56:59,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,567 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:59,855 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash -68264931, now seen corresponding path program 567 times [2022-03-15 15:56:59,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:59,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819273318] [2022-03-15 15:56:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:59,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:59,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:59,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819273318] [2022-03-15 15:56:59,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819273318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:59,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860675610] [2022-03-15 15:56:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:59,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:59,985 INFO L229 MonitoredProcess]: Starting monitored process 568 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:59,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Waiting until timeout for monitored process [2022-03-15 15:57:00,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:00,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:00,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:00,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:57:00,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:00,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:57:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:00,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:00,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:57:00,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:00,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:57:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860675610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:00,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:00,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:00,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979296952] [2022-03-15 15:57:00,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:00,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:00,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:00,310 INFO L87 Difference]: Start difference. First operand 661 states and 1803 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:00,542 INFO L93 Difference]: Finished difference Result 730 states and 1943 transitions. [2022-03-15 15:57:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:00,543 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:57:00,543 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:57:00,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:00,543 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:00,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 98 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 299 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:57:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:57:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 661. [2022-03-15 15:57:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.728787878787879) internal successors, (1801), 660 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1801 transitions. [2022-03-15 15:57:00,550 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1801 transitions. Word has length 19 [2022-03-15 15:57:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:00,550 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1801 transitions. [2022-03-15 15:57:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1801 transitions. [2022-03-15 15:57:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:00,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:00,550 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:00,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Ended with exit code 0 [2022-03-15 15:57:00,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,568 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,766 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash 903899703, now seen corresponding path program 568 times [2022-03-15 15:57:00,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:00,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858076271] [2022-03-15 15:57:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:00,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858076271] [2022-03-15 15:57:00,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858076271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:00,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026468142] [2022-03-15 15:57:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:00,866 INFO L229 MonitoredProcess]: Starting monitored process 569 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:00,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Waiting until timeout for monitored process [2022-03-15 15:57:00,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:00,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:01,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:01,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:01,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:57:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:01,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:01,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:57:01,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:01,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026468142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:01,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:01,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:01,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128731500] [2022-03-15 15:57:01,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:01,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:01,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:01,196 INFO L87 Difference]: Start difference. First operand 661 states and 1801 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:01,426 INFO L93 Difference]: Finished difference Result 783 states and 2052 transitions. [2022-03-15 15:57:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:57:01,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:01,427 INFO L225 Difference]: With dead ends: 783 [2022-03-15 15:57:01,427 INFO L226 Difference]: Without dead ends: 783 [2022-03-15 15:57:01,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:01,427 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:01,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 173 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 521 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-03-15 15:57:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-15 15:57:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 659. [2022-03-15 15:57:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7279635258358663) internal successors, (1795), 658 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1795 transitions. [2022-03-15 15:57:01,434 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1795 transitions. Word has length 19 [2022-03-15 15:57:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:01,434 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1795 transitions. [2022-03-15 15:57:01,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1795 transitions. [2022-03-15 15:57:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:01,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:01,435 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:01,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Ended with exit code 0 [2022-03-15 15:57:01,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2022-03-15 15:57:01,651 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2106794939, now seen corresponding path program 569 times [2022-03-15 15:57:01,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:01,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348874759] [2022-03-15 15:57:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:01,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348874759] [2022-03-15 15:57:01,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348874759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:01,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835254541] [2022-03-15 15:57:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:01,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:01,808 INFO L229 MonitoredProcess]: Starting monitored process 570 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:01,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Waiting until timeout for monitored process [2022-03-15 15:57:01,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:57:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:02,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:57:02,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:02,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:57:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:02,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:02,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:02,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:57:02,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:02,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:57:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:02,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835254541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:02,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:02,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:02,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790365737] [2022-03-15 15:57:02,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:02,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:02,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:02,253 INFO L87 Difference]: Start difference. First operand 659 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:02,522 INFO L93 Difference]: Finished difference Result 739 states and 1957 transitions. [2022-03-15 15:57:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:02,523 INFO L225 Difference]: With dead ends: 739 [2022-03-15 15:57:02,523 INFO L226 Difference]: Without dead ends: 739 [2022-03-15 15:57:02,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:57:02,523 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:02,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 144 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 380 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-03-15 15:57:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-15 15:57:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 660. [2022-03-15 15:57:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7298937784522) internal successors, (1799), 659 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1799 transitions. [2022-03-15 15:57:02,530 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1799 transitions. Word has length 19 [2022-03-15 15:57:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:02,530 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1799 transitions. [2022-03-15 15:57:02,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1799 transitions. [2022-03-15 15:57:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:02,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:02,530 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:02,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Ended with exit code 0 [2022-03-15 15:57:02,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2022-03-15 15:57:02,731 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1239345291, now seen corresponding path program 570 times [2022-03-15 15:57:02,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:02,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582125200] [2022-03-15 15:57:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:02,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:02,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:02,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582125200] [2022-03-15 15:57:02,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582125200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:02,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296106655] [2022-03-15 15:57:02,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:02,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:02,834 INFO L229 MonitoredProcess]: Starting monitored process 571 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:02,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Waiting until timeout for monitored process [2022-03-15 15:57:02,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:57:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:03,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:03,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:03,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:03,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:57:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:03,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:57:03,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296106655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:03,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:03,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:03,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405822762] [2022-03-15 15:57:03,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:03,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:03,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:03,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:03,222 INFO L87 Difference]: Start difference. First operand 660 states and 1799 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:03,360 INFO L93 Difference]: Finished difference Result 739 states and 1955 transitions. [2022-03-15 15:57:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:03,361 INFO L225 Difference]: With dead ends: 739 [2022-03-15 15:57:03,361 INFO L226 Difference]: Without dead ends: 736 [2022-03-15 15:57:03,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:03,362 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:03,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 132 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 322 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-03-15 15:57:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-15 15:57:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 660. [2022-03-15 15:57:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7283763277693476) internal successors, (1798), 659 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1798 transitions. [2022-03-15 15:57:03,368 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1798 transitions. Word has length 19 [2022-03-15 15:57:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:03,368 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1798 transitions. [2022-03-15 15:57:03,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1798 transitions. [2022-03-15 15:57:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:03,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:03,369 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:03,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Ended with exit code 0 [2022-03-15 15:57:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2022-03-15 15:57:03,575 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash -828055617, now seen corresponding path program 571 times [2022-03-15 15:57:03,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:03,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777889275] [2022-03-15 15:57:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:03,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777889275] [2022-03-15 15:57:03,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777889275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:03,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519847631] [2022-03-15 15:57:03,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:03,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:03,678 INFO L229 MonitoredProcess]: Starting monitored process 572 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:03,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Waiting until timeout for monitored process [2022-03-15 15:57:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:03,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:03,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:03,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:57:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:03,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:03,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:57:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:04,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519847631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:04,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:04,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:04,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007379717] [2022-03-15 15:57:04,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:04,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:04,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:04,015 INFO L87 Difference]: Start difference. First operand 660 states and 1798 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:04,108 INFO L93 Difference]: Finished difference Result 730 states and 1943 transitions. [2022-03-15 15:57:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:04,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:04,109 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:57:04,109 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 15:57:04,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:04,109 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:04,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 164 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 358 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-03-15 15:57:04,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 15:57:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 659. [2022-03-15 15:57:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7279635258358663) internal successors, (1795), 658 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1795 transitions. [2022-03-15 15:57:04,115 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1795 transitions. Word has length 19 [2022-03-15 15:57:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:04,115 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1795 transitions. [2022-03-15 15:57:04,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1795 transitions. [2022-03-15 15:57:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:04,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:04,116 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:04,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:04,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2022-03-15 15:57:04,329 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:04,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:04,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1222978033, now seen corresponding path program 572 times [2022-03-15 15:57:04,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:04,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146761703] [2022-03-15 15:57:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:04,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146761703] [2022-03-15 15:57:04,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146761703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367292787] [2022-03-15 15:57:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:04,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:04,461 INFO L229 MonitoredProcess]: Starting monitored process 573 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Waiting until timeout for monitored process [2022-03-15 15:57:04,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:04,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:04,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:04,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:04,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:57:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:04,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:04,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:04,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 15:57:04,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:04,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-03-15 15:57:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:04,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367292787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:04,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:04,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:04,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227211451] [2022-03-15 15:57:04,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:04,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:04,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:04,848 INFO L87 Difference]: Start difference. First operand 659 states and 1795 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:05,066 INFO L93 Difference]: Finished difference Result 725 states and 1934 transitions. [2022-03-15 15:57:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:05,067 INFO L225 Difference]: With dead ends: 725 [2022-03-15 15:57:05,067 INFO L226 Difference]: Without dead ends: 723 [2022-03-15 15:57:05,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:05,067 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:05,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 326 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-03-15 15:57:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-03-15 15:57:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 659. [2022-03-15 15:57:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7279635258358663) internal successors, (1795), 658 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1795 transitions. [2022-03-15 15:57:05,074 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1795 transitions. Word has length 19 [2022-03-15 15:57:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:05,074 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1795 transitions. [2022-03-15 15:57:05,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1795 transitions. [2022-03-15 15:57:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:05,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:05,074 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:05,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:05,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,573 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:05,290 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1320740919, now seen corresponding path program 573 times [2022-03-15 15:57:05,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:05,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460344322] [2022-03-15 15:57:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:05,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:05,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460344322] [2022-03-15 15:57:05,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460344322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:05,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823763222] [2022-03-15 15:57:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:05,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:05,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:05,393 INFO L229 MonitoredProcess]: Starting monitored process 574 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:05,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Waiting until timeout for monitored process [2022-03-15 15:57:05,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:05,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:05,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:05,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:05,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:05,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:05,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:05,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:05,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:05,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:57:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:05,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823763222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:05,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:05,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:05,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835854837] [2022-03-15 15:57:05,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:05,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:05,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:05,721 INFO L87 Difference]: Start difference. First operand 659 states and 1795 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:05,843 INFO L93 Difference]: Finished difference Result 724 states and 1934 transitions. [2022-03-15 15:57:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:05,844 INFO L225 Difference]: With dead ends: 724 [2022-03-15 15:57:05,844 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:57:05,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:05,844 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:05,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 144 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 172 Unchecked, 0.1s Time] [2022-03-15 15:57:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:57:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 658. [2022-03-15 15:57:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.7290715372907153) internal successors, (1793), 657 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1793 transitions. [2022-03-15 15:57:05,851 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1793 transitions. Word has length 19 [2022-03-15 15:57:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:05,851 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1793 transitions. [2022-03-15 15:57:05,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1793 transitions. [2022-03-15 15:57:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:05,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:05,852 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:05,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Ended with exit code 0 [2022-03-15 15:57:06,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,574 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:06,068 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -786043201, now seen corresponding path program 574 times [2022-03-15 15:57:06,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:06,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781534297] [2022-03-15 15:57:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:06,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:06,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:06,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781534297] [2022-03-15 15:57:06,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781534297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:06,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192648580] [2022-03-15 15:57:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:06,171 INFO L229 MonitoredProcess]: Starting monitored process 575 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:06,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Waiting until timeout for monitored process [2022-03-15 15:57:06,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:06,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:06,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:06,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:06,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:06,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:57:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:06,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:06,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:06,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:57:06,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:06,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:06,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192648580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:06,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:06,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:06,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290469174] [2022-03-15 15:57:06,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:06,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:06,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:06,514 INFO L87 Difference]: Start difference. First operand 658 states and 1793 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:06,587 INFO L93 Difference]: Finished difference Result 730 states and 1944 transitions. [2022-03-15 15:57:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:06,589 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:57:06,589 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 15:57:06,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:06,589 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:06,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 148 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 158 Unchecked, 0.1s Time] [2022-03-15 15:57:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 15:57:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 660. [2022-03-15 15:57:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7298937784522) internal successors, (1799), 659 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1799 transitions. [2022-03-15 15:57:06,595 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1799 transitions. Word has length 19 [2022-03-15 15:57:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:06,595 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1799 transitions. [2022-03-15 15:57:06,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1799 transitions. [2022-03-15 15:57:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:06,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:06,596 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:06,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:06,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2022-03-15 15:57:06,810 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 179151123, now seen corresponding path program 575 times [2022-03-15 15:57:06,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:06,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141820299] [2022-03-15 15:57:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:06,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:06,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141820299] [2022-03-15 15:57:06,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141820299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:06,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576261015] [2022-03-15 15:57:06,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:06,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:06,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:06,912 INFO L229 MonitoredProcess]: Starting monitored process 576 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:06,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Waiting until timeout for monitored process [2022-03-15 15:57:06,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:06,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:07,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:07,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:07,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:07,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:07,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:57:07,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:07,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576261015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:07,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:07,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:07,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224144035] [2022-03-15 15:57:07,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:07,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:07,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:07,192 INFO L87 Difference]: Start difference. First operand 660 states and 1799 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:07,284 INFO L93 Difference]: Finished difference Result 730 states and 1947 transitions. [2022-03-15 15:57:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:07,285 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:57:07,285 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 15:57:07,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:07,286 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:07,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 128 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:57:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 15:57:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 657. [2022-03-15 15:57:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.730182926829268) internal successors, (1791), 656 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1791 transitions. [2022-03-15 15:57:07,292 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1791 transitions. Word has length 19 [2022-03-15 15:57:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:07,292 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1791 transitions. [2022-03-15 15:57:07,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1791 transitions. [2022-03-15 15:57:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:07,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:07,293 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:07,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:07,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,576 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:07,509 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1671841481, now seen corresponding path program 576 times [2022-03-15 15:57:07,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:07,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127514762] [2022-03-15 15:57:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:07,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:07,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127514762] [2022-03-15 15:57:07,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127514762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:07,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637393936] [2022-03-15 15:57:07,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:07,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:07,573 INFO L229 MonitoredProcess]: Starting monitored process 577 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:07,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Waiting until timeout for monitored process [2022-03-15 15:57:07,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:07,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:07,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:07,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:07,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:07,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:07,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:07,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:57:07,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:07,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:57:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637393936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:07,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:07,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:07,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161718316] [2022-03-15 15:57:07,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:07,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:07,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:07,884 INFO L87 Difference]: Start difference. First operand 657 states and 1791 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:07,966 INFO L93 Difference]: Finished difference Result 730 states and 1945 transitions. [2022-03-15 15:57:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:07,967 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:57:07,967 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 15:57:07,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:07,967 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:07,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 148 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-03-15 15:57:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 15:57:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 657. [2022-03-15 15:57:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.730182926829268) internal successors, (1791), 656 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1791 transitions. [2022-03-15 15:57:07,974 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1791 transitions. Word has length 19 [2022-03-15 15:57:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:07,974 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1791 transitions. [2022-03-15 15:57:07,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1791 transitions. [2022-03-15 15:57:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:07,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:07,974 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:07,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Ended with exit code 0 [2022-03-15 15:57:08,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,577 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:08,187 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash -130226715, now seen corresponding path program 577 times [2022-03-15 15:57:08,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:08,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107109257] [2022-03-15 15:57:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:08,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:08,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107109257] [2022-03-15 15:57:08,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107109257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:08,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625459165] [2022-03-15 15:57:08,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:08,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:08,273 INFO L229 MonitoredProcess]: Starting monitored process 578 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:08,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Waiting until timeout for monitored process [2022-03-15 15:57:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:08,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:08,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:57:08,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:08,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:57:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:08,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:08,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:08,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-15 15:57:08,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:08,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:57:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:08,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625459165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:08,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:08,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-15 15:57:08,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971239029] [2022-03-15 15:57:08,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:08,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:57:08,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:57:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:57:08,582 INFO L87 Difference]: Start difference. First operand 657 states and 1791 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:08,707 INFO L93 Difference]: Finished difference Result 724 states and 1928 transitions. [2022-03-15 15:57:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:08,708 INFO L225 Difference]: With dead ends: 724 [2022-03-15 15:57:08,708 INFO L226 Difference]: Without dead ends: 716 [2022-03-15 15:57:08,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:08,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:08,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 165 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-03-15 15:57:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-15 15:57:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 656. [2022-03-15 15:57:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7297709923664124) internal successors, (1788), 655 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1788 transitions. [2022-03-15 15:57:08,715 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1788 transitions. Word has length 19 [2022-03-15 15:57:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1788 transitions. [2022-03-15 15:57:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1788 transitions. [2022-03-15 15:57:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:08,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:08,716 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:08,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:08,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,578 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:08,916 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1712301317, now seen corresponding path program 578 times [2022-03-15 15:57:08,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:08,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935893698] [2022-03-15 15:57:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:08,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:09,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:09,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935893698] [2022-03-15 15:57:09,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935893698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:09,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106787201] [2022-03-15 15:57:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:09,076 INFO L229 MonitoredProcess]: Starting monitored process 579 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:09,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Waiting until timeout for monitored process [2022-03-15 15:57:09,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:09,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:09,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:09,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:09,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:57:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:09,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:09,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:09,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:57:09,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:57:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:09,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106787201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:09,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:09,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:57:09,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301055924] [2022-03-15 15:57:09,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:09,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:09,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:09,520 INFO L87 Difference]: Start difference. First operand 656 states and 1788 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:09,696 INFO L93 Difference]: Finished difference Result 758 states and 2022 transitions. [2022-03-15 15:57:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:09,698 INFO L225 Difference]: With dead ends: 758 [2022-03-15 15:57:09,698 INFO L226 Difference]: Without dead ends: 758 [2022-03-15 15:57:09,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:57:09,698 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:09,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 96 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-03-15 15:57:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-15 15:57:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 659. [2022-03-15 15:57:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.729483282674772) internal successors, (1796), 658 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1796 transitions. [2022-03-15 15:57:09,704 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1796 transitions. Word has length 19 [2022-03-15 15:57:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:09,705 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1796 transitions. [2022-03-15 15:57:09,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1796 transitions. [2022-03-15 15:57:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:09,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:09,705 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:09,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:09,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2022-03-15 15:57:09,915 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash -352184577, now seen corresponding path program 579 times [2022-03-15 15:57:09,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:09,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524605406] [2022-03-15 15:57:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:09,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:10,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524605406] [2022-03-15 15:57:10,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524605406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:10,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679389063] [2022-03-15 15:57:10,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:10,024 INFO L229 MonitoredProcess]: Starting monitored process 580 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:10,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Waiting until timeout for monitored process [2022-03-15 15:57:10,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:10,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:10,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:10,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:57:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:10,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:57:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:10,343 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:10,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679389063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:10,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:10,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:10,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684394026] [2022-03-15 15:57:10,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:10,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:10,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:10,354 INFO L87 Difference]: Start difference. First operand 659 states and 1796 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:10,450 INFO L93 Difference]: Finished difference Result 762 states and 2031 transitions. [2022-03-15 15:57:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:10,451 INFO L225 Difference]: With dead ends: 762 [2022-03-15 15:57:10,451 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 15:57:10,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:10,451 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:10,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 104 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 259 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-03-15 15:57:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 15:57:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 659. [2022-03-15 15:57:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.729483282674772) internal successors, (1796), 658 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1796 transitions. [2022-03-15 15:57:10,458 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1796 transitions. Word has length 19 [2022-03-15 15:57:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:10,458 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1796 transitions. [2022-03-15 15:57:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1796 transitions. [2022-03-15 15:57:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:10,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:10,459 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:10,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:10,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2022-03-15 15:57:10,666 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:10,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2011211173, now seen corresponding path program 580 times [2022-03-15 15:57:10,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:10,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848621554] [2022-03-15 15:57:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:10,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:10,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848621554] [2022-03-15 15:57:10,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848621554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:10,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780460564] [2022-03-15 15:57:10,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:10,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:10,820 INFO L229 MonitoredProcess]: Starting monitored process 581 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:10,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Waiting until timeout for monitored process [2022-03-15 15:57:10,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:10,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:11,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:11,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:57:11,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:11,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:57:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:11,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:11,234 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:11,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-15 15:57:11,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:57:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:11,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780460564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:11,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:11,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:11,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193442137] [2022-03-15 15:57:11,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:11,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:11,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:11,257 INFO L87 Difference]: Start difference. First operand 659 states and 1796 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:11,740 INFO L93 Difference]: Finished difference Result 772 states and 2032 transitions. [2022-03-15 15:57:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:11,741 INFO L225 Difference]: With dead ends: 772 [2022-03-15 15:57:11,741 INFO L226 Difference]: Without dead ends: 770 [2022-03-15 15:57:11,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:57:11,741 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:11,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 195 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 365 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-03-15 15:57:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-15 15:57:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 659. [2022-03-15 15:57:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7279635258358663) internal successors, (1795), 658 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1795 transitions. [2022-03-15 15:57:11,748 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1795 transitions. Word has length 19 [2022-03-15 15:57:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:11,748 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1795 transitions. [2022-03-15 15:57:11,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1795 transitions. [2022-03-15 15:57:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:11,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:11,749 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:11,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:11,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 581 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2022-03-15 15:57:11,949 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 259962829, now seen corresponding path program 581 times [2022-03-15 15:57:11,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:11,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127327910] [2022-03-15 15:57:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:12,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127327910] [2022-03-15 15:57:12,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127327910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:12,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399373511] [2022-03-15 15:57:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:12,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:12,057 INFO L229 MonitoredProcess]: Starting monitored process 582 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:12,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Waiting until timeout for monitored process [2022-03-15 15:57:12,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:57:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:12,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:12,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:12,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:12,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:12,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:12,413 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:12,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399373511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:12,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:12,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:12,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914172686] [2022-03-15 15:57:12,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:12,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:12,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:12,427 INFO L87 Difference]: Start difference. First operand 659 states and 1795 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:12,497 INFO L93 Difference]: Finished difference Result 757 states and 2013 transitions. [2022-03-15 15:57:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:12,498 INFO L225 Difference]: With dead ends: 757 [2022-03-15 15:57:12,498 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 15:57:12,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:12,498 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:12,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2022-03-15 15:57:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 15:57:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 661. [2022-03-15 15:57:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.728787878787879) internal successors, (1801), 660 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1801 transitions. [2022-03-15 15:57:12,505 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1801 transitions. Word has length 19 [2022-03-15 15:57:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:12,505 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1801 transitions. [2022-03-15 15:57:12,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1801 transitions. [2022-03-15 15:57:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:12,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:12,506 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:12,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:12,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,582 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:12,706 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1796611959, now seen corresponding path program 582 times [2022-03-15 15:57:12,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:12,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958634673] [2022-03-15 15:57:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:12,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:12,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958634673] [2022-03-15 15:57:12,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958634673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:12,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979225624] [2022-03-15 15:57:12,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:12,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:12,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:12,815 INFO L229 MonitoredProcess]: Starting monitored process 583 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:12,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Waiting until timeout for monitored process [2022-03-15 15:57:12,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:12,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:13,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:13,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:13,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:13,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:13,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:13,147 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:13,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:13,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979225624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:13,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:13,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:13,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127192111] [2022-03-15 15:57:13,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:13,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:13,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:13,158 INFO L87 Difference]: Start difference. First operand 661 states and 1801 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:13,252 INFO L93 Difference]: Finished difference Result 760 states and 2019 transitions. [2022-03-15 15:57:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:13,254 INFO L225 Difference]: With dead ends: 760 [2022-03-15 15:57:13,254 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 15:57:13,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:13,254 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:13,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-03-15 15:57:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 15:57:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 660. [2022-03-15 15:57:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7283763277693476) internal successors, (1798), 659 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1798 transitions. [2022-03-15 15:57:13,260 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1798 transitions. Word has length 19 [2022-03-15 15:57:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:13,260 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1798 transitions. [2022-03-15 15:57:13,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1798 transitions. [2022-03-15 15:57:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:13,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:13,261 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:13,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Ended with exit code 0 [2022-03-15 15:57:13,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2022-03-15 15:57:13,477 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1225157153, now seen corresponding path program 583 times [2022-03-15 15:57:13,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:13,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273939508] [2022-03-15 15:57:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:13,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:13,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273939508] [2022-03-15 15:57:13,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273939508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:13,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691771395] [2022-03-15 15:57:13,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:13,587 INFO L229 MonitoredProcess]: Starting monitored process 584 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Waiting until timeout for monitored process [2022-03-15 15:57:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:13,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:13,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:13,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:13,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:13,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:14,018 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:14,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691771395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:14,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:14,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:14,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515311215] [2022-03-15 15:57:14,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:14,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:14,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:14,032 INFO L87 Difference]: Start difference. First operand 660 states and 1798 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:14,119 INFO L93 Difference]: Finished difference Result 764 states and 2033 transitions. [2022-03-15 15:57:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:14,120 INFO L225 Difference]: With dead ends: 764 [2022-03-15 15:57:14,120 INFO L226 Difference]: Without dead ends: 764 [2022-03-15 15:57:14,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:14,120 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:14,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2022-03-15 15:57:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-15 15:57:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 659. [2022-03-15 15:57:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7279635258358663) internal successors, (1795), 658 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1795 transitions. [2022-03-15 15:57:14,127 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1795 transitions. Word has length 19 [2022-03-15 15:57:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:14,127 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1795 transitions. [2022-03-15 15:57:14,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1795 transitions. [2022-03-15 15:57:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:14,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:14,128 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:14,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Ended with exit code 0 [2022-03-15 15:57:14,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2022-03-15 15:57:14,328 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1846821291, now seen corresponding path program 584 times [2022-03-15 15:57:14,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:14,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387118206] [2022-03-15 15:57:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:14,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:14,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387118206] [2022-03-15 15:57:14,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387118206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:14,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629090868] [2022-03-15 15:57:14,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:14,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:14,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:14,432 INFO L229 MonitoredProcess]: Starting monitored process 585 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:14,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Waiting until timeout for monitored process [2022-03-15 15:57:14,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:14,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:14,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:14,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:14,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:14,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:14,748 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:14,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629090868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:14,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:14,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:14,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855903176] [2022-03-15 15:57:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:14,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:14,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:14,759 INFO L87 Difference]: Start difference. First operand 659 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:14,862 INFO L93 Difference]: Finished difference Result 763 states and 2036 transitions. [2022-03-15 15:57:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:14,863 INFO L225 Difference]: With dead ends: 763 [2022-03-15 15:57:14,863 INFO L226 Difference]: Without dead ends: 763 [2022-03-15 15:57:14,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:14,863 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:14,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-03-15 15:57:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-03-15 15:57:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 662. [2022-03-15 15:57:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.729198184568835) internal successors, (1804), 661 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1804 transitions. [2022-03-15 15:57:14,870 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1804 transitions. Word has length 19 [2022-03-15 15:57:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:14,870 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1804 transitions. [2022-03-15 15:57:14,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1804 transitions. [2022-03-15 15:57:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:14,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:14,870 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:14,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Ended with exit code 0 [2022-03-15 15:57:15,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2022-03-15 15:57:15,078 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash -310172161, now seen corresponding path program 585 times [2022-03-15 15:57:15,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:15,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313005748] [2022-03-15 15:57:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:15,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313005748] [2022-03-15 15:57:15,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313005748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:15,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149797638] [2022-03-15 15:57:15,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:15,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:15,185 INFO L229 MonitoredProcess]: Starting monitored process 586 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:15,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Waiting until timeout for monitored process [2022-03-15 15:57:15,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:15,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:15,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:15,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:15,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:15,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:15,528 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:15,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149797638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:15,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:15,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:15,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386601195] [2022-03-15 15:57:15,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:15,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:15,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:15,542 INFO L87 Difference]: Start difference. First operand 662 states and 1804 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:15,635 INFO L93 Difference]: Finished difference Result 762 states and 2025 transitions. [2022-03-15 15:57:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:15,636 INFO L225 Difference]: With dead ends: 762 [2022-03-15 15:57:15,636 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 15:57:15,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:15,637 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:15,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 94 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-03-15 15:57:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 15:57:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 661. [2022-03-15 15:57:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.728787878787879) internal successors, (1801), 660 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1801 transitions. [2022-03-15 15:57:15,643 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1801 transitions. Word has length 19 [2022-03-15 15:57:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:15,643 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1801 transitions. [2022-03-15 15:57:15,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1801 transitions. [2022-03-15 15:57:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:15,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:15,644 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:15,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Ended with exit code 0 [2022-03-15 15:57:15,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2022-03-15 15:57:15,854 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:15,855 INFO L85 PathProgramCache]: Analyzing trace with hash -881626967, now seen corresponding path program 586 times [2022-03-15 15:57:15,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:15,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948329185] [2022-03-15 15:57:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:15,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948329185] [2022-03-15 15:57:15,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948329185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:15,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936008667] [2022-03-15 15:57:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:15,956 INFO L229 MonitoredProcess]: Starting monitored process 587 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:15,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Waiting until timeout for monitored process [2022-03-15 15:57:15,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:15,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:16,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:16,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:16,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:16,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:16,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:16,292 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:16,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:16,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936008667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:16,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:16,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:16,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859621481] [2022-03-15 15:57:16,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:16,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:16,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:16,303 INFO L87 Difference]: Start difference. First operand 661 states and 1801 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:16,373 INFO L93 Difference]: Finished difference Result 764 states and 2028 transitions. [2022-03-15 15:57:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:16,374 INFO L225 Difference]: With dead ends: 764 [2022-03-15 15:57:16,374 INFO L226 Difference]: Without dead ends: 764 [2022-03-15 15:57:16,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:16,374 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:16,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 112 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-03-15 15:57:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-15 15:57:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 663. [2022-03-15 15:57:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.729607250755287) internal successors, (1807), 662 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1807 transitions. [2022-03-15 15:57:16,381 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1807 transitions. Word has length 19 [2022-03-15 15:57:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:16,381 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1807 transitions. [2022-03-15 15:57:16,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1807 transitions. [2022-03-15 15:57:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:16,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:16,382 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:16,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Ended with exit code 0 [2022-03-15 15:57:16,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,587 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:16,597 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1416856769, now seen corresponding path program 587 times [2022-03-15 15:57:16,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:16,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038122247] [2022-03-15 15:57:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:16,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:16,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038122247] [2022-03-15 15:57:16,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038122247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:16,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755383592] [2022-03-15 15:57:16,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:16,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:16,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:16,698 INFO L229 MonitoredProcess]: Starting monitored process 588 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:16,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Waiting until timeout for monitored process [2022-03-15 15:57:16,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:16,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:16,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:16,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:16,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:16,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:17,022 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:17,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:17,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755383592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:17,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:17,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:17,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497374917] [2022-03-15 15:57:17,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:17,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:17,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:17,031 INFO L87 Difference]: Start difference. First operand 663 states and 1807 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:17,113 INFO L93 Difference]: Finished difference Result 773 states and 2046 transitions. [2022-03-15 15:57:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:17,114 INFO L225 Difference]: With dead ends: 773 [2022-03-15 15:57:17,114 INFO L226 Difference]: Without dead ends: 773 [2022-03-15 15:57:17,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:17,114 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:17,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-15 15:57:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-03-15 15:57:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 663. [2022-03-15 15:57:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.729607250755287) internal successors, (1807), 662 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1807 transitions. [2022-03-15 15:57:17,121 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1807 transitions. Word has length 19 [2022-03-15 15:57:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:17,121 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1807 transitions. [2022-03-15 15:57:17,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1807 transitions. [2022-03-15 15:57:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:17,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:17,122 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:17,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Ended with exit code 0 [2022-03-15 15:57:17,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,588 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:17,323 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1562347725, now seen corresponding path program 588 times [2022-03-15 15:57:17,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:17,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821716764] [2022-03-15 15:57:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:17,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:17,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821716764] [2022-03-15 15:57:17,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821716764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:17,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138072417] [2022-03-15 15:57:17,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:17,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:17,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:17,417 INFO L229 MonitoredProcess]: Starting monitored process 589 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:17,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Waiting until timeout for monitored process [2022-03-15 15:57:17,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:17,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:17,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:17,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:17,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:17,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:57:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:17,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:17,662 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:17,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:17,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138072417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:17,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:17,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:17,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222055357] [2022-03-15 15:57:17,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:17,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:17,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:17,670 INFO L87 Difference]: Start difference. First operand 663 states and 1807 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:17,738 INFO L93 Difference]: Finished difference Result 767 states and 2043 transitions. [2022-03-15 15:57:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:17,739 INFO L225 Difference]: With dead ends: 767 [2022-03-15 15:57:17,739 INFO L226 Difference]: Without dead ends: 767 [2022-03-15 15:57:17,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:17,739 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:17,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 99 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-03-15 15:57:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-15 15:57:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 666. [2022-03-15 15:57:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.730827067669173) internal successors, (1816), 665 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1816 transitions. [2022-03-15 15:57:17,746 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1816 transitions. Word has length 19 [2022-03-15 15:57:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:17,746 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1816 transitions. [2022-03-15 15:57:17,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1816 transitions. [2022-03-15 15:57:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:17,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:17,747 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:17,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:17,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,589 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:17,962 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1195970441, now seen corresponding path program 589 times [2022-03-15 15:57:17,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:17,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776529838] [2022-03-15 15:57:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:17,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:18,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:18,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776529838] [2022-03-15 15:57:18,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776529838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:18,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32191533] [2022-03-15 15:57:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:18,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:18,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:18,029 INFO L229 MonitoredProcess]: Starting monitored process 590 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:18,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Waiting until timeout for monitored process [2022-03-15 15:57:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:18,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:18,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:18,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:57:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:18,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:18,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:18,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:18,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32191533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:18,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:18,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:18,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616416536] [2022-03-15 15:57:18,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:18,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:18,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:18,283 INFO L87 Difference]: Start difference. First operand 666 states and 1816 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:18,346 INFO L93 Difference]: Finished difference Result 768 states and 2043 transitions. [2022-03-15 15:57:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:57:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:18,354 INFO L225 Difference]: With dead ends: 768 [2022-03-15 15:57:18,354 INFO L226 Difference]: Without dead ends: 768 [2022-03-15 15:57:18,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:18,367 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:18,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-03-15 15:57:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-15 15:57:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 666. [2022-03-15 15:57:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.730827067669173) internal successors, (1816), 665 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1816 transitions. [2022-03-15 15:57:18,385 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1816 transitions. Word has length 19 [2022-03-15 15:57:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1816 transitions. [2022-03-15 15:57:18,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1816 transitions. [2022-03-15 15:57:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:18,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:18,386 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:18,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:18,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2022-03-15 15:57:18,599 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1767425247, now seen corresponding path program 590 times [2022-03-15 15:57:18,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:18,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69084387] [2022-03-15 15:57:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:18,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:18,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69084387] [2022-03-15 15:57:18,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69084387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:18,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703516688] [2022-03-15 15:57:18,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:18,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:18,696 INFO L229 MonitoredProcess]: Starting monitored process 591 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:18,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Waiting until timeout for monitored process [2022-03-15 15:57:18,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:18,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:18,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:18,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:18,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:57:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:18,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:19,047 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:19,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703516688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:19,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:19,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:19,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868655683] [2022-03-15 15:57:19,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:19,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:19,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:19,062 INFO L87 Difference]: Start difference. First operand 666 states and 1816 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:19,138 INFO L93 Difference]: Finished difference Result 767 states and 2037 transitions. [2022-03-15 15:57:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:19,140 INFO L225 Difference]: With dead ends: 767 [2022-03-15 15:57:19,140 INFO L226 Difference]: Without dead ends: 767 [2022-03-15 15:57:19,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:19,140 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:19,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 92 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-15 15:57:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-15 15:57:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 665. [2022-03-15 15:57:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.730421686746988) internal successors, (1813), 664 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1813 transitions. [2022-03-15 15:57:19,147 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1813 transitions. Word has length 19 [2022-03-15 15:57:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:19,147 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1813 transitions. [2022-03-15 15:57:19,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1813 transitions. [2022-03-15 15:57:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:19,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:19,148 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:19,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Ended with exit code 0 [2022-03-15 15:57:19,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,591 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:19,359 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1992312247, now seen corresponding path program 591 times [2022-03-15 15:57:19,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:19,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834804991] [2022-03-15 15:57:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:19,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834804991] [2022-03-15 15:57:19,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834804991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:19,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182659361] [2022-03-15 15:57:19,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:19,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:19,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:19,459 INFO L229 MonitoredProcess]: Starting monitored process 592 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:19,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Waiting until timeout for monitored process [2022-03-15 15:57:19,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:19,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:19,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:19,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:19,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 15:57:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:19,697 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:19,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182659361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:19,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:19,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:19,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052394286] [2022-03-15 15:57:19,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:19,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:19,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:19,705 INFO L87 Difference]: Start difference. First operand 665 states and 1813 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:19,783 INFO L93 Difference]: Finished difference Result 781 states and 2067 transitions. [2022-03-15 15:57:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:19,785 INFO L225 Difference]: With dead ends: 781 [2022-03-15 15:57:19,785 INFO L226 Difference]: Without dead ends: 781 [2022-03-15 15:57:19,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:19,785 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:19,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 156 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 334 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-15 15:57:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-15 15:57:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 669. [2022-03-15 15:57:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.7320359281437128) internal successors, (1825), 668 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1825 transitions. [2022-03-15 15:57:19,791 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1825 transitions. Word has length 19 [2022-03-15 15:57:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:19,792 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1825 transitions. [2022-03-15 15:57:19,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1825 transitions. [2022-03-15 15:57:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:19,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:19,792 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:19,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:20,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,592 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:20,008 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1714909727, now seen corresponding path program 592 times [2022-03-15 15:57:20,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:20,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227381150] [2022-03-15 15:57:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:20,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:20,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:20,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227381150] [2022-03-15 15:57:20,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227381150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:20,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992074064] [2022-03-15 15:57:20,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:20,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:20,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:20,082 INFO L229 MonitoredProcess]: Starting monitored process 593 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:20,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Waiting until timeout for monitored process [2022-03-15 15:57:20,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:20,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:20,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:20,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:20,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:20,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:20,361 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:20,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:20,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992074064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:20,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:20,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:20,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477846805] [2022-03-15 15:57:20,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:20,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:20,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:20,371 INFO L87 Difference]: Start difference. First operand 669 states and 1825 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:20,441 INFO L93 Difference]: Finished difference Result 782 states and 2081 transitions. [2022-03-15 15:57:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:20,442 INFO L225 Difference]: With dead ends: 782 [2022-03-15 15:57:20,442 INFO L226 Difference]: Without dead ends: 782 [2022-03-15 15:57:20,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:20,442 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:20,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 129 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-03-15 15:57:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-15 15:57:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 668. [2022-03-15 15:57:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.7316341829085458) internal successors, (1822), 667 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1822 transitions. [2022-03-15 15:57:20,449 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1822 transitions. Word has length 19 [2022-03-15 15:57:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:20,449 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1822 transitions. [2022-03-15 15:57:20,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1822 transitions. [2022-03-15 15:57:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:20,450 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:20,450 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:20,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:20,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2022-03-15 15:57:20,665 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash -550080905, now seen corresponding path program 593 times [2022-03-15 15:57:20,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:20,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542101856] [2022-03-15 15:57:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:20,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:20,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542101856] [2022-03-15 15:57:20,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542101856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:20,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206468932] [2022-03-15 15:57:20,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:20,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:20,753 INFO L229 MonitoredProcess]: Starting monitored process 594 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:20,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Waiting until timeout for monitored process [2022-03-15 15:57:20,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:57:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:20,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:57:20,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 15:57:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:20,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:21,004 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:21,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206468932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:21,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:21,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-15 15:57:21,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075171693] [2022-03-15 15:57:21,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:21,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:21,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:21,016 INFO L87 Difference]: Start difference. First operand 668 states and 1822 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:21,210 INFO L93 Difference]: Finished difference Result 843 states and 2187 transitions. [2022-03-15 15:57:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:21,211 INFO L225 Difference]: With dead ends: 843 [2022-03-15 15:57:21,212 INFO L226 Difference]: Without dead ends: 843 [2022-03-15 15:57:21,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:21,212 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:21,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 255 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 553 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-15 15:57:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-03-15 15:57:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 670. [2022-03-15 15:57:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.7369207772795217) internal successors, (1831), 669 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1831 transitions. [2022-03-15 15:57:21,219 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1831 transitions. Word has length 19 [2022-03-15 15:57:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:21,219 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1831 transitions. [2022-03-15 15:57:21,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1831 transitions. [2022-03-15 15:57:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:21,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:21,219 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:21,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Ended with exit code 0 [2022-03-15 15:57:21,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2022-03-15 15:57:21,424 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 569048135, now seen corresponding path program 594 times [2022-03-15 15:57:21,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:21,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559411737] [2022-03-15 15:57:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:21,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559411737] [2022-03-15 15:57:21,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559411737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:21,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304147341] [2022-03-15 15:57:21,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:21,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:21,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:21,548 INFO L229 MonitoredProcess]: Starting monitored process 595 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:21,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Waiting until timeout for monitored process [2022-03-15 15:57:21,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:21,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:21,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:21,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:21,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:57:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:21,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:57:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:21,847 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:21,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2022-03-15 15:57:21,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:57:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304147341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:21,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:21,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:21,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527635229] [2022-03-15 15:57:21,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:21,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:21,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:21,870 INFO L87 Difference]: Start difference. First operand 670 states and 1831 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:22,053 INFO L93 Difference]: Finished difference Result 791 states and 2077 transitions. [2022-03-15 15:57:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:22,054 INFO L225 Difference]: With dead ends: 791 [2022-03-15 15:57:22,054 INFO L226 Difference]: Without dead ends: 781 [2022-03-15 15:57:22,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:22,054 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:22,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 152 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 310 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-03-15 15:57:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-15 15:57:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 670. [2022-03-15 15:57:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.7354260089686098) internal successors, (1830), 669 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1830 transitions. [2022-03-15 15:57:22,061 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1830 transitions. Word has length 19 [2022-03-15 15:57:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:22,061 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1830 transitions. [2022-03-15 15:57:22,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1830 transitions. [2022-03-15 15:57:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:22,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:22,062 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:22,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:22,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,595 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:22,262 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:22,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:22,262 INFO L85 PathProgramCache]: Analyzing trace with hash 688228019, now seen corresponding path program 595 times [2022-03-15 15:57:22,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:22,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293044185] [2022-03-15 15:57:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:22,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:22,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:22,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293044185] [2022-03-15 15:57:22,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293044185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:22,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118123737] [2022-03-15 15:57:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:22,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:22,354 INFO L229 MonitoredProcess]: Starting monitored process 596 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:22,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Waiting until timeout for monitored process [2022-03-15 15:57:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:22,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:57:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:22,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:22,668 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:22,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:22,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118123737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:22,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:22,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-15 15:57:22,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23126822] [2022-03-15 15:57:22,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:22,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:57:22,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:57:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:22,681 INFO L87 Difference]: Start difference. First operand 670 states and 1830 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:22,865 INFO L93 Difference]: Finished difference Result 954 states and 2585 transitions. [2022-03-15 15:57:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:22,867 INFO L225 Difference]: With dead ends: 954 [2022-03-15 15:57:22,867 INFO L226 Difference]: Without dead ends: 954 [2022-03-15 15:57:22,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:22,867 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:22,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 169 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 478 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-03-15 15:57:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-15 15:57:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 666. [2022-03-15 15:57:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.73984962406015) internal successors, (1822), 665 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1822 transitions. [2022-03-15 15:57:22,875 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1822 transitions. Word has length 19 [2022-03-15 15:57:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:22,875 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1822 transitions. [2022-03-15 15:57:22,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1822 transitions. [2022-03-15 15:57:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:22,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:22,876 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:22,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Ended with exit code 0 [2022-03-15 15:57:23,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,596 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:23,092 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1268156053, now seen corresponding path program 596 times [2022-03-15 15:57:23,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:23,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905041698] [2022-03-15 15:57:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:23,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905041698] [2022-03-15 15:57:23,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905041698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:23,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790258688] [2022-03-15 15:57:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:23,218 INFO L229 MonitoredProcess]: Starting monitored process 597 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:23,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Waiting until timeout for monitored process [2022-03-15 15:57:23,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:23,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:23,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:23,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 15:57:23,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:23,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-03-15 15:57:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:23,512 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:23,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2022-03-15 15:57:23,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 15:57:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790258688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:23,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:23,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:57:23,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651762530] [2022-03-15 15:57:23,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:23,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:23,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:23,527 INFO L87 Difference]: Start difference. First operand 666 states and 1822 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:23,652 INFO L93 Difference]: Finished difference Result 725 states and 1950 transitions. [2022-03-15 15:57:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:23,653 INFO L225 Difference]: With dead ends: 725 [2022-03-15 15:57:23,653 INFO L226 Difference]: Without dead ends: 719 [2022-03-15 15:57:23,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:23,653 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:23,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 116 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 329 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:57:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-03-15 15:57:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 662. [2022-03-15 15:57:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.747352496217852) internal successors, (1816), 661 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1816 transitions. [2022-03-15 15:57:23,660 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1816 transitions. Word has length 19 [2022-03-15 15:57:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:23,660 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1816 transitions. [2022-03-15 15:57:23,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1816 transitions. [2022-03-15 15:57:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:57:23,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:23,661 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:23,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:23,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2022-03-15 15:57:23,878 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1867062819, now seen corresponding path program 597 times [2022-03-15 15:57:23,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:23,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234042347] [2022-03-15 15:57:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:23,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:23,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234042347] [2022-03-15 15:57:23,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234042347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:23,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037407997] [2022-03-15 15:57:23,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:23,981 INFO L229 MonitoredProcess]: Starting monitored process 598 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:23,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Waiting until timeout for monitored process [2022-03-15 15:57:24,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:57:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:24,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:24,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:24,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:57:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:24,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:24,396 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:24,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:24,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037407997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:24,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:24,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:24,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062749981] [2022-03-15 15:57:24,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:24,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:24,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:24,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:24,408 INFO L87 Difference]: Start difference. First operand 662 states and 1816 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:24,517 INFO L93 Difference]: Finished difference Result 730 states and 1966 transitions. [2022-03-15 15:57:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:57:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:24,518 INFO L225 Difference]: With dead ends: 730 [2022-03-15 15:57:24,518 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 15:57:24,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:24,519 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:24,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 308 Invalid, 0 Unknown, 172 Unchecked, 0.1s Time] [2022-03-15 15:57:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 15:57:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 659. [2022-03-15 15:57:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.7507598784194527) internal successors, (1810), 658 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1810 transitions. [2022-03-15 15:57:24,525 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1810 transitions. Word has length 19 [2022-03-15 15:57:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1810 transitions. [2022-03-15 15:57:24,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1810 transitions. [2022-03-15 15:57:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:24,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:24,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:24,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:24,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 598 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2022-03-15 15:57:24,726 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2062272542, now seen corresponding path program 598 times [2022-03-15 15:57:24,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:24,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83456924] [2022-03-15 15:57:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:24,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:24,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:24,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83456924] [2022-03-15 15:57:24,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83456924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:24,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831279843] [2022-03-15 15:57:24,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:24,950 INFO L229 MonitoredProcess]: Starting monitored process 599 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:24,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Waiting until timeout for monitored process [2022-03-15 15:57:24,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:24,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:25,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-15 15:57:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:25,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:25,762 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:25,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 60 [2022-03-15 15:57:25,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2022-03-15 15:57:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:25,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831279843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:25,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:25,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-03-15 15:57:25,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107136761] [2022-03-15 15:57:25,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:25,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:57:25,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:57:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:57:25,796 INFO L87 Difference]: Start difference. First operand 659 states and 1810 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:26,174 INFO L93 Difference]: Finished difference Result 836 states and 2226 transitions. [2022-03-15 15:57:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:57:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:26,176 INFO L225 Difference]: With dead ends: 836 [2022-03-15 15:57:26,176 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 15:57:26,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:26,176 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:26,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 233 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 798 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-03-15 15:57:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 15:57:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 661. [2022-03-15 15:57:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.7484848484848485) internal successors, (1814), 660 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1814 transitions. [2022-03-15 15:57:26,183 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1814 transitions. Word has length 20 [2022-03-15 15:57:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1814 transitions. [2022-03-15 15:57:26,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1814 transitions. [2022-03-15 15:57:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:26,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:26,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:26,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Ended with exit code 0 [2022-03-15 15:57:26,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2022-03-15 15:57:26,398 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1062608972, now seen corresponding path program 599 times [2022-03-15 15:57:26,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:26,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065901565] [2022-03-15 15:57:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:26,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:26,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065901565] [2022-03-15 15:57:26,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065901565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:26,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910946660] [2022-03-15 15:57:26,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:26,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:26,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:26,595 INFO L229 MonitoredProcess]: Starting monitored process 600 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:26,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Waiting until timeout for monitored process [2022-03-15 15:57:26,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:26,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:26,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:26,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:27,537 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:27,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 74 [2022-03-15 15:57:27,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-03-15 15:57:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:27,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910946660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:27,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:27,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:27,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035104040] [2022-03-15 15:57:27,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:27,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:27,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:27,582 INFO L87 Difference]: Start difference. First operand 661 states and 1814 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:27,859 INFO L93 Difference]: Finished difference Result 806 states and 2177 transitions. [2022-03-15 15:57:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:27,859 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:27,860 INFO L225 Difference]: With dead ends: 806 [2022-03-15 15:57:27,860 INFO L226 Difference]: Without dead ends: 788 [2022-03-15 15:57:27,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:27,861 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:27,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 268 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 617 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2022-03-15 15:57:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-15 15:57:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 667. [2022-03-15 15:57:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.74024024024024) internal successors, (1825), 666 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1825 transitions. [2022-03-15 15:57:27,868 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1825 transitions. Word has length 20 [2022-03-15 15:57:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:27,868 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1825 transitions. [2022-03-15 15:57:27,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1825 transitions. [2022-03-15 15:57:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:27,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:27,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:27,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:28,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,600 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:28,083 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:28,083 INFO L85 PathProgramCache]: Analyzing trace with hash 545706210, now seen corresponding path program 600 times [2022-03-15 15:57:28,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:28,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198565596] [2022-03-15 15:57:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:28,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:28,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:28,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198565596] [2022-03-15 15:57:28,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198565596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:28,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403522520] [2022-03-15 15:57:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:28,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:28,274 INFO L229 MonitoredProcess]: Starting monitored process 601 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:28,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Waiting until timeout for monitored process [2022-03-15 15:57:28,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:57:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:28,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:28,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:28,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:28,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:29,190 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:29,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2022-03-15 15:57:29,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-03-15 15:57:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:29,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403522520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:29,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:29,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:29,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407281351] [2022-03-15 15:57:29,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:29,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:29,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:29,237 INFO L87 Difference]: Start difference. First operand 667 states and 1825 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:29,475 INFO L93 Difference]: Finished difference Result 812 states and 2185 transitions. [2022-03-15 15:57:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:29,477 INFO L225 Difference]: With dead ends: 812 [2022-03-15 15:57:29,477 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 15:57:29,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:29,477 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:29,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 265 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 540 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-03-15 15:57:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 15:57:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 672. [2022-03-15 15:57:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 2.7317436661698955) internal successors, (1833), 671 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1833 transitions. [2022-03-15 15:57:29,484 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1833 transitions. Word has length 20 [2022-03-15 15:57:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:29,484 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1833 transitions. [2022-03-15 15:57:29,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1833 transitions. [2022-03-15 15:57:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:29,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:29,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:29,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Ended with exit code 0 [2022-03-15 15:57:29,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,601 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:29,685 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1172034560, now seen corresponding path program 601 times [2022-03-15 15:57:29,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:29,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432397636] [2022-03-15 15:57:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:29,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:29,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432397636] [2022-03-15 15:57:29,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432397636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:29,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689903565] [2022-03-15 15:57:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:29,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:29,863 INFO L229 MonitoredProcess]: Starting monitored process 602 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:29,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Waiting until timeout for monitored process [2022-03-15 15:57:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:30,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:57:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:30,864 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:30,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 74 [2022-03-15 15:57:30,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-03-15 15:57:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689903565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:30,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:30,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:30,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933643029] [2022-03-15 15:57:30,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:30,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:30,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:30,897 INFO L87 Difference]: Start difference. First operand 672 states and 1833 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:31,209 INFO L93 Difference]: Finished difference Result 827 states and 2208 transitions. [2022-03-15 15:57:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:31,211 INFO L225 Difference]: With dead ends: 827 [2022-03-15 15:57:31,211 INFO L226 Difference]: Without dead ends: 814 [2022-03-15 15:57:31,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:31,211 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:31,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 337 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 818 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-03-15 15:57:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-15 15:57:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 679. [2022-03-15 15:57:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.7212389380530975) internal successors, (1845), 678 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1845 transitions. [2022-03-15 15:57:31,218 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1845 transitions. Word has length 20 [2022-03-15 15:57:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:31,218 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1845 transitions. [2022-03-15 15:57:31,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,218 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1845 transitions. [2022-03-15 15:57:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:31,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:31,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:31,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:31,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,602 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:31,436 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2089984750, now seen corresponding path program 602 times [2022-03-15 15:57:31,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:31,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039757648] [2022-03-15 15:57:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:31,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:31,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039757648] [2022-03-15 15:57:31,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039757648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:31,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071140502] [2022-03-15 15:57:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:31,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:31,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:31,558 INFO L229 MonitoredProcess]: Starting monitored process 603 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:31,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Waiting until timeout for monitored process [2022-03-15 15:57:31,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:31,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:31,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:31,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:57:31,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:31,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:57:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:31,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:32,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:32,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:57:32,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:57:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071140502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:32,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:32,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:32,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061075580] [2022-03-15 15:57:32,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:32,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:32,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:32,275 INFO L87 Difference]: Start difference. First operand 679 states and 1845 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:32,520 INFO L93 Difference]: Finished difference Result 820 states and 2194 transitions. [2022-03-15 15:57:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:32,521 INFO L225 Difference]: With dead ends: 820 [2022-03-15 15:57:32,521 INFO L226 Difference]: Without dead ends: 814 [2022-03-15 15:57:32,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:32,522 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:32,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 276 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 664 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2022-03-15 15:57:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-15 15:57:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 679. [2022-03-15 15:57:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.71976401179941) internal successors, (1844), 678 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1844 transitions. [2022-03-15 15:57:32,529 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1844 transitions. Word has length 20 [2022-03-15 15:57:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:32,529 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1844 transitions. [2022-03-15 15:57:32,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1844 transitions. [2022-03-15 15:57:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:32,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:32,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:32,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Ended with exit code 0 [2022-03-15 15:57:32,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,603 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:32,731 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 512803264, now seen corresponding path program 603 times [2022-03-15 15:57:32,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:32,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255813156] [2022-03-15 15:57:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:32,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255813156] [2022-03-15 15:57:32,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255813156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:32,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752005985] [2022-03-15 15:57:32,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:32,899 INFO L229 MonitoredProcess]: Starting monitored process 604 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:32,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Waiting until timeout for monitored process [2022-03-15 15:57:32,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:33,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:33,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:57:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:33,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:33,914 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:33,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 74 [2022-03-15 15:57:33,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-03-15 15:57:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:33,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752005985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:33,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:33,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:33,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157620785] [2022-03-15 15:57:33,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:33,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:33,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:33,942 INFO L87 Difference]: Start difference. First operand 679 states and 1844 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:34,176 INFO L93 Difference]: Finished difference Result 817 states and 2194 transitions. [2022-03-15 15:57:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:34,177 INFO L225 Difference]: With dead ends: 817 [2022-03-15 15:57:34,177 INFO L226 Difference]: Without dead ends: 798 [2022-03-15 15:57:34,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:34,178 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:34,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 249 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 622 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2022-03-15 15:57:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-03-15 15:57:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 678. [2022-03-15 15:57:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 2.723781388478582) internal successors, (1844), 677 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1844 transitions. [2022-03-15 15:57:34,185 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1844 transitions. Word has length 20 [2022-03-15 15:57:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:34,185 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1844 transitions. [2022-03-15 15:57:34,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1844 transitions. [2022-03-15 15:57:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:34,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:34,186 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:34,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:34,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,604 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:34,399 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash 625550900, now seen corresponding path program 604 times [2022-03-15 15:57:34,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:34,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860849074] [2022-03-15 15:57:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:34,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860849074] [2022-03-15 15:57:34,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860849074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:34,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396903155] [2022-03-15 15:57:34,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:34,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:34,573 INFO L229 MonitoredProcess]: Starting monitored process 605 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Waiting until timeout for monitored process [2022-03-15 15:57:34,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:34,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:34,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:34,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:34,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:34,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:35,290 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:35,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:57:35,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:57:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:35,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396903155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:35,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:35,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:35,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565757335] [2022-03-15 15:57:35,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:35,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:35,317 INFO L87 Difference]: Start difference. First operand 678 states and 1844 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:35,535 INFO L93 Difference]: Finished difference Result 814 states and 2188 transitions. [2022-03-15 15:57:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:35,536 INFO L225 Difference]: With dead ends: 814 [2022-03-15 15:57:35,537 INFO L226 Difference]: Without dead ends: 802 [2022-03-15 15:57:35,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:35,537 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:35,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 247 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 592 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2022-03-15 15:57:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-15 15:57:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 683. [2022-03-15 15:57:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 2.7155425219941347) internal successors, (1852), 682 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1852 transitions. [2022-03-15 15:57:35,544 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1852 transitions. Word has length 20 [2022-03-15 15:57:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:35,544 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1852 transitions. [2022-03-15 15:57:35,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1852 transitions. [2022-03-15 15:57:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:35,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:35,545 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:35,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:35,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,605 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:35,759 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1066628382, now seen corresponding path program 605 times [2022-03-15 15:57:35,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:35,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599058578] [2022-03-15 15:57:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:35,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:35,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:35,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599058578] [2022-03-15 15:57:35,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599058578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:35,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749491227] [2022-03-15 15:57:35,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:35,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:35,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:35,940 INFO L229 MonitoredProcess]: Starting monitored process 606 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:35,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Waiting until timeout for monitored process [2022-03-15 15:57:35,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:35,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:36,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:36,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:36,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:36,789 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:36,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:57:36,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:57:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749491227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:36,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:36,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:36,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174573415] [2022-03-15 15:57:36,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:36,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:36,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:36,829 INFO L87 Difference]: Start difference. First operand 683 states and 1852 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:37,082 INFO L93 Difference]: Finished difference Result 818 states and 2228 transitions. [2022-03-15 15:57:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:37,083 INFO L225 Difference]: With dead ends: 818 [2022-03-15 15:57:37,083 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 15:57:37,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:57:37,083 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:37,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 198 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 392 Invalid, 0 Unknown, 301 Unchecked, 0.1s Time] [2022-03-15 15:57:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 15:57:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 679. [2022-03-15 15:57:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.7227138643067845) internal successors, (1846), 678 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1846 transitions. [2022-03-15 15:57:37,091 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1846 transitions. Word has length 20 [2022-03-15 15:57:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:37,091 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1846 transitions. [2022-03-15 15:57:37,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1846 transitions. [2022-03-15 15:57:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:37,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:37,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:37,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:37,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,606 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:37,307 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash 960632192, now seen corresponding path program 606 times [2022-03-15 15:57:37,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:37,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288866766] [2022-03-15 15:57:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:37,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:37,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288866766] [2022-03-15 15:57:37,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288866766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:37,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125053390] [2022-03-15 15:57:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:37,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:37,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:37,581 INFO L229 MonitoredProcess]: Starting monitored process 607 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:37,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Waiting until timeout for monitored process [2022-03-15 15:57:37,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:37,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:57:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:37,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:37,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:37,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:37,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:38,745 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:38,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2022-03-15 15:57:38,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-03-15 15:57:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:38,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125053390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:38,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:38,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:38,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450791009] [2022-03-15 15:57:38,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:38,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:38,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:38,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:38,790 INFO L87 Difference]: Start difference. First operand 679 states and 1846 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:39,036 INFO L93 Difference]: Finished difference Result 824 states and 2208 transitions. [2022-03-15 15:57:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:39,037 INFO L225 Difference]: With dead ends: 824 [2022-03-15 15:57:39,037 INFO L226 Difference]: Without dead ends: 821 [2022-03-15 15:57:39,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:39,037 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:39,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 215 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 532 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-03-15 15:57:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-03-15 15:57:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 683. [2022-03-15 15:57:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 2.719941348973607) internal successors, (1855), 682 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1855 transitions. [2022-03-15 15:57:39,045 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1855 transitions. Word has length 20 [2022-03-15 15:57:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:39,045 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1855 transitions. [2022-03-15 15:57:39,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1855 transitions. [2022-03-15 15:57:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:39,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:39,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:39,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Ended with exit code 0 [2022-03-15 15:57:39,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,607 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:39,262 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash -756522222, now seen corresponding path program 607 times [2022-03-15 15:57:39,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:39,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791231773] [2022-03-15 15:57:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:39,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:39,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791231773] [2022-03-15 15:57:39,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791231773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:39,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065455590] [2022-03-15 15:57:39,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:39,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:39,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:39,518 INFO L229 MonitoredProcess]: Starting monitored process 608 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:39,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Waiting until timeout for monitored process [2022-03-15 15:57:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:39,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:39,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:57:39,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:39,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:57:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:39,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:40,413 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:40,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-03-15 15:57:40,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2022-03-15 15:57:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:40,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065455590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:40,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:40,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:40,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913947384] [2022-03-15 15:57:40,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:40,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:40,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:40,450 INFO L87 Difference]: Start difference. First operand 683 states and 1855 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:40,729 INFO L93 Difference]: Finished difference Result 814 states and 2190 transitions. [2022-03-15 15:57:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:40,730 INFO L225 Difference]: With dead ends: 814 [2022-03-15 15:57:40,730 INFO L226 Difference]: Without dead ends: 804 [2022-03-15 15:57:40,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:40,730 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:40,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 208 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 597 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-03-15 15:57:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-15 15:57:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 684. [2022-03-15 15:57:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.717423133235725) internal successors, (1856), 683 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1856 transitions. [2022-03-15 15:57:40,737 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1856 transitions. Word has length 20 [2022-03-15 15:57:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:40,738 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1856 transitions. [2022-03-15 15:57:40,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1856 transitions. [2022-03-15 15:57:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:40,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:40,738 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:40,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Ended with exit code 0 [2022-03-15 15:57:40,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2022-03-15 15:57:40,943 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1106768716, now seen corresponding path program 608 times [2022-03-15 15:57:40,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:40,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111568065] [2022-03-15 15:57:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:40,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:41,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111568065] [2022-03-15 15:57:41,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111568065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:41,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800934093] [2022-03-15 15:57:41,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:41,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:41,150 INFO L229 MonitoredProcess]: Starting monitored process 609 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:41,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Waiting until timeout for monitored process [2022-03-15 15:57:41,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:41,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:41,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:41,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:42,043 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:42,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 74 [2022-03-15 15:57:42,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 53 [2022-03-15 15:57:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:42,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800934093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:42,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:42,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:42,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598873419] [2022-03-15 15:57:42,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:42,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:42,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:42,072 INFO L87 Difference]: Start difference. First operand 684 states and 1856 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:43,537 INFO L93 Difference]: Finished difference Result 989 states and 2463 transitions. [2022-03-15 15:57:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:57:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:43,539 INFO L225 Difference]: With dead ends: 989 [2022-03-15 15:57:43,539 INFO L226 Difference]: Without dead ends: 942 [2022-03-15 15:57:43,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:57:43,539 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:43,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 425 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 891 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2022-03-15 15:57:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-03-15 15:57:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 689. [2022-03-15 15:57:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.7238372093023258) internal successors, (1874), 688 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1874 transitions. [2022-03-15 15:57:43,547 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1874 transitions. Word has length 20 [2022-03-15 15:57:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:43,547 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1874 transitions. [2022-03-15 15:57:43,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1874 transitions. [2022-03-15 15:57:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:43,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:43,548 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:43,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:43,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2022-03-15 15:57:43,759 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash -527246830, now seen corresponding path program 609 times [2022-03-15 15:57:43,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:43,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070556067] [2022-03-15 15:57:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:43,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:43,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070556067] [2022-03-15 15:57:43,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070556067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:43,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726340019] [2022-03-15 15:57:43,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:43,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:43,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:43,851 INFO L229 MonitoredProcess]: Starting monitored process 610 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:43,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Waiting until timeout for monitored process [2022-03-15 15:57:43,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:43,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:44,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:44,105 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:44,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:57:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726340019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:44,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:44,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:57:44,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901556963] [2022-03-15 15:57:44,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:44,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:44,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:44,114 INFO L87 Difference]: Start difference. First operand 689 states and 1874 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:44,194 INFO L93 Difference]: Finished difference Result 782 states and 2067 transitions. [2022-03-15 15:57:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:57:44,194 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:44,195 INFO L225 Difference]: With dead ends: 782 [2022-03-15 15:57:44,195 INFO L226 Difference]: Without dead ends: 782 [2022-03-15 15:57:44,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:44,195 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:44,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 317 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2022-03-15 15:57:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-15 15:57:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 689. [2022-03-15 15:57:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.7238372093023258) internal successors, (1874), 688 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1874 transitions. [2022-03-15 15:57:44,202 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1874 transitions. Word has length 20 [2022-03-15 15:57:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:44,202 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1874 transitions. [2022-03-15 15:57:44,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1874 transitions. [2022-03-15 15:57:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:44,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:44,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:44,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 610 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable614 [2022-03-15 15:57:44,415 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1699075826, now seen corresponding path program 610 times [2022-03-15 15:57:44,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:44,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592245827] [2022-03-15 15:57:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:44,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592245827] [2022-03-15 15:57:44,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592245827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:44,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273821883] [2022-03-15 15:57:44,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:44,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:44,643 INFO L229 MonitoredProcess]: Starting monitored process 611 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:44,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Waiting until timeout for monitored process [2022-03-15 15:57:44,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:44,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:44,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:44,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:44,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:57:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:45,386 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:45,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:57:45,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:57:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:45,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273821883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:45,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:45,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:45,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949641999] [2022-03-15 15:57:45,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:45,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:45,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:45,433 INFO L87 Difference]: Start difference. First operand 689 states and 1874 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:45,716 INFO L93 Difference]: Finished difference Result 795 states and 2094 transitions. [2022-03-15 15:57:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:45,718 INFO L225 Difference]: With dead ends: 795 [2022-03-15 15:57:45,718 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:57:45,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:45,718 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:45,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 360 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 684 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2022-03-15 15:57:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:57:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 691. [2022-03-15 15:57:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.7202898550724637) internal successors, (1877), 690 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1877 transitions. [2022-03-15 15:57:45,725 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1877 transitions. Word has length 20 [2022-03-15 15:57:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:45,725 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1877 transitions. [2022-03-15 15:57:45,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1877 transitions. [2022-03-15 15:57:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:45,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:45,725 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:45,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:45,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,611 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,931 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash -90760644, now seen corresponding path program 611 times [2022-03-15 15:57:45,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:45,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694852695] [2022-03-15 15:57:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:46,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694852695] [2022-03-15 15:57:46,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694852695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:46,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487245289] [2022-03-15 15:57:46,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:46,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:46,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:46,164 INFO L229 MonitoredProcess]: Starting monitored process 612 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:46,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Waiting until timeout for monitored process [2022-03-15 15:57:46,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:46,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:46,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:46,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:57:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:46,928 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:46,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:57:46,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:57:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487245289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:46,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:46,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:46,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910700057] [2022-03-15 15:57:46,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:46,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:46,982 INFO L87 Difference]: Start difference. First operand 691 states and 1877 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:47,344 INFO L93 Difference]: Finished difference Result 786 states and 2076 transitions. [2022-03-15 15:57:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:47,346 INFO L225 Difference]: With dead ends: 786 [2022-03-15 15:57:47,346 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:57:47,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:47,346 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:47,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 280 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 872 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-03-15 15:57:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:57:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 693. [2022-03-15 15:57:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 2.7167630057803467) internal successors, (1880), 692 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1880 transitions. [2022-03-15 15:57:47,353 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1880 transitions. Word has length 20 [2022-03-15 15:57:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:47,353 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1880 transitions. [2022-03-15 15:57:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1880 transitions. [2022-03-15 15:57:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:47,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:47,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:47,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:47,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2022-03-15 15:57:47,566 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:47,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1008710834, now seen corresponding path program 612 times [2022-03-15 15:57:47,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:47,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594657756] [2022-03-15 15:57:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:47,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:47,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594657756] [2022-03-15 15:57:47,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594657756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:47,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223558012] [2022-03-15 15:57:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:47,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:47,793 INFO L229 MonitoredProcess]: Starting monitored process 613 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Waiting until timeout for monitored process [2022-03-15 15:57:47,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:47,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:57:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:48,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:57:48,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:48,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:48,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:48,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:48,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:57:48,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:48,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:57:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:48,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223558012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:48,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:48,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:48,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487405645] [2022-03-15 15:57:48,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:48,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:48,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:48,793 INFO L87 Difference]: Start difference. First operand 693 states and 1880 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:49,064 INFO L93 Difference]: Finished difference Result 785 states and 2075 transitions. [2022-03-15 15:57:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:49,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:49,065 INFO L225 Difference]: With dead ends: 785 [2022-03-15 15:57:49,065 INFO L226 Difference]: Without dead ends: 782 [2022-03-15 15:57:49,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:49,065 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:49,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 229 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 619 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-03-15 15:57:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-15 15:57:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 691. [2022-03-15 15:57:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.7202898550724637) internal successors, (1877), 690 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1877 transitions. [2022-03-15 15:57:49,072 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1877 transitions. Word has length 20 [2022-03-15 15:57:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:49,072 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1877 transitions. [2022-03-15 15:57:49,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1877 transitions. [2022-03-15 15:57:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:49,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:49,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:49,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:49,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,613 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:49,274 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1808501414, now seen corresponding path program 613 times [2022-03-15 15:57:49,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:49,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203794511] [2022-03-15 15:57:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:49,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:49,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:49,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203794511] [2022-03-15 15:57:49,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203794511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:49,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716660251] [2022-03-15 15:57:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:49,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:49,468 INFO L229 MonitoredProcess]: Starting monitored process 614 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:49,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Waiting until timeout for monitored process [2022-03-15 15:57:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:49,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:49,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:49,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:57:49,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:49,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:49,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:50,366 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:50,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:57:50,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:57:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:50,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716660251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:50,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:50,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:50,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732061424] [2022-03-15 15:57:50,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:50,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:50,432 INFO L87 Difference]: Start difference. First operand 691 states and 1877 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:50,784 INFO L93 Difference]: Finished difference Result 794 states and 2092 transitions. [2022-03-15 15:57:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:50,786 INFO L225 Difference]: With dead ends: 794 [2022-03-15 15:57:50,786 INFO L226 Difference]: Without dead ends: 781 [2022-03-15 15:57:50,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:50,786 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:50,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 276 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 778 Invalid, 0 Unknown, 160 Unchecked, 0.3s Time] [2022-03-15 15:57:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-15 15:57:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 696. [2022-03-15 15:57:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.7151079136690646) internal successors, (1887), 695 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1887 transitions. [2022-03-15 15:57:50,794 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1887 transitions. Word has length 20 [2022-03-15 15:57:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:50,794 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1887 transitions. [2022-03-15 15:57:50,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1887 transitions. [2022-03-15 15:57:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:50,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:50,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:50,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:50,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,614 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:50,995 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:50,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1568515692, now seen corresponding path program 614 times [2022-03-15 15:57:50,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:50,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412957190] [2022-03-15 15:57:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:51,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:51,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412957190] [2022-03-15 15:57:51,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412957190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:51,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862014352] [2022-03-15 15:57:51,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:51,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:51,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:51,197 INFO L229 MonitoredProcess]: Starting monitored process 615 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:51,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Waiting until timeout for monitored process [2022-03-15 15:57:51,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:51,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:51,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:51,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:51,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:51,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:51,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:52,166 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:52,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:57:52,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:57:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:52,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862014352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:52,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:52,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:52,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634693379] [2022-03-15 15:57:52,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:52,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:52,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:52,236 INFO L87 Difference]: Start difference. First operand 696 states and 1887 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:52,587 INFO L93 Difference]: Finished difference Result 787 states and 2078 transitions. [2022-03-15 15:57:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:52,588 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:52,589 INFO L225 Difference]: With dead ends: 787 [2022-03-15 15:57:52,589 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 15:57:52,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:52,589 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:52,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 249 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 766 Invalid, 0 Unknown, 206 Unchecked, 0.3s Time] [2022-03-15 15:57:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 15:57:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 692. [2022-03-15 15:57:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.7192474674384948) internal successors, (1879), 691 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1879 transitions. [2022-03-15 15:57:52,596 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1879 transitions. Word has length 20 [2022-03-15 15:57:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:52,597 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 1879 transitions. [2022-03-15 15:57:52,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1879 transitions. [2022-03-15 15:57:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:52,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:52,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:52,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:52,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable619 [2022-03-15 15:57:52,813 INFO L402 AbstractCegarLoop]: === Iteration 621 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash -10915954, now seen corresponding path program 615 times [2022-03-15 15:57:52,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:52,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679625506] [2022-03-15 15:57:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:53,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:53,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679625506] [2022-03-15 15:57:53,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679625506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:53,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948422631] [2022-03-15 15:57:53,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:53,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:53,050 INFO L229 MonitoredProcess]: Starting monitored process 616 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:53,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Waiting until timeout for monitored process [2022-03-15 15:57:53,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:53,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:53,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:53,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:53,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:53,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:53,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:57:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:53,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:54,034 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:54,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:57:54,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:57:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:54,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948422631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:54,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:54,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:54,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404061984] [2022-03-15 15:57:54,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:54,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:54,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:54,105 INFO L87 Difference]: Start difference. First operand 692 states and 1879 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:54,417 INFO L93 Difference]: Finished difference Result 791 states and 2086 transitions. [2022-03-15 15:57:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:54,418 INFO L225 Difference]: With dead ends: 791 [2022-03-15 15:57:54,418 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:57:54,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:54,419 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:54,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 263 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 642 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-03-15 15:57:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:57:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 695. [2022-03-15 15:57:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.7161383285302594) internal successors, (1885), 694 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1885 transitions. [2022-03-15 15:57:54,426 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1885 transitions. Word has length 20 [2022-03-15 15:57:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:54,426 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1885 transitions. [2022-03-15 15:57:54,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1885 transitions. [2022-03-15 15:57:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:54,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:54,427 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:54,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Ended with exit code 0 [2022-03-15 15:57:54,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2022-03-15 15:57:54,627 INFO L402 AbstractCegarLoop]: === Iteration 622 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1703095236, now seen corresponding path program 616 times [2022-03-15 15:57:54,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:54,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154034994] [2022-03-15 15:57:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:54,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:54,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154034994] [2022-03-15 15:57:54,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154034994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:54,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195735562] [2022-03-15 15:57:54,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:54,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:54,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:54,866 INFO L229 MonitoredProcess]: Starting monitored process 617 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:54,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Waiting until timeout for monitored process [2022-03-15 15:57:54,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:54,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:55,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:55,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:55,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:57:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:55,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:55,745 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:55,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:57:55,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:57:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:55,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195735562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:55,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:55,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:55,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035146409] [2022-03-15 15:57:55,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:55,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:55,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:55,804 INFO L87 Difference]: Start difference. First operand 695 states and 1885 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:56,112 INFO L93 Difference]: Finished difference Result 784 states and 2072 transitions. [2022-03-15 15:57:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:56,113 INFO L225 Difference]: With dead ends: 784 [2022-03-15 15:57:56,113 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 15:57:56,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:56,114 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:56,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 235 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 719 Invalid, 0 Unknown, 168 Unchecked, 0.3s Time] [2022-03-15 15:57:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 15:57:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 693. [2022-03-15 15:57:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 2.718208092485549) internal successors, (1881), 692 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1881 transitions. [2022-03-15 15:57:56,121 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1881 transitions. Word has length 20 [2022-03-15 15:57:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:56,121 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1881 transitions. [2022-03-15 15:57:56,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1881 transitions. [2022-03-15 15:57:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:56,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:56,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:56,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:56,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2022-03-15 15:57:56,335 INFO L402 AbstractCegarLoop]: === Iteration 623 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:56,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:56,336 INFO L85 PathProgramCache]: Analyzing trace with hash 324165338, now seen corresponding path program 617 times [2022-03-15 15:57:56,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:56,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278566755] [2022-03-15 15:57:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:56,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:56,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:56,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278566755] [2022-03-15 15:57:56,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278566755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:56,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55511003] [2022-03-15 15:57:56,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:56,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:56,494 INFO L229 MonitoredProcess]: Starting monitored process 618 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:56,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Waiting until timeout for monitored process [2022-03-15 15:57:56,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:56,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:56,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:56,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:56,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:57:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:56,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:57:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:56,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:57,358 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:57:57,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:57:57,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:57:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:57,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55511003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:57,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:57,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:57:57,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684381804] [2022-03-15 15:57:57,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:57,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:57,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:57,407 INFO L87 Difference]: Start difference. First operand 693 states and 1881 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:57,606 INFO L93 Difference]: Finished difference Result 788 states and 2080 transitions. [2022-03-15 15:57:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:57,607 INFO L225 Difference]: With dead ends: 788 [2022-03-15 15:57:57,607 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 15:57:57,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:57,607 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:57,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 191 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 514 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-03-15 15:57:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 15:57:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 694. [2022-03-15 15:57:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.717171717171717) internal successors, (1883), 693 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1883 transitions. [2022-03-15 15:57:57,614 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1883 transitions. Word has length 20 [2022-03-15 15:57:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:57,614 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1883 transitions. [2022-03-15 15:57:57,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1883 transitions. [2022-03-15 15:57:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:57,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:57,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:57,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Ended with exit code 0 [2022-03-15 15:57:57,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2022-03-15 15:57:57,830 INFO L402 AbstractCegarLoop]: === Iteration 624 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1743235570, now seen corresponding path program 618 times [2022-03-15 15:57:57,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:57,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944528094] [2022-03-15 15:57:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:57,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:58,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:58,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944528094] [2022-03-15 15:57:58,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944528094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:58,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129982382] [2022-03-15 15:57:58,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:58,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:58,006 INFO L229 MonitoredProcess]: Starting monitored process 619 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:58,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Waiting until timeout for monitored process [2022-03-15 15:57:58,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:57:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:58,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:57:58,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:58,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:57:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:58,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:58,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:58,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:57:58,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:58,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:57:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129982382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:59,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:59,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:57:59,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459922736] [2022-03-15 15:57:59,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:59,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:59,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:59,037 INFO L87 Difference]: Start difference. First operand 694 states and 1883 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:59,392 INFO L93 Difference]: Finished difference Result 807 states and 2110 transitions. [2022-03-15 15:57:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:57:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:59,393 INFO L225 Difference]: With dead ends: 807 [2022-03-15 15:57:59,394 INFO L226 Difference]: Without dead ends: 791 [2022-03-15 15:57:59,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:59,394 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:59,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 201 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 642 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2022-03-15 15:57:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-15 15:57:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 695. [2022-03-15 15:57:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.717579250720461) internal successors, (1886), 694 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1886 transitions. [2022-03-15 15:57:59,401 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1886 transitions. Word has length 20 [2022-03-15 15:57:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1886 transitions. [2022-03-15 15:57:59,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1886 transitions. [2022-03-15 15:57:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:57:59,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:59,402 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:59,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:59,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2022-03-15 15:57:59,618 INFO L402 AbstractCegarLoop]: === Iteration 625 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash -500200000, now seen corresponding path program 619 times [2022-03-15 15:57:59,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:59,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847830336] [2022-03-15 15:57:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:59,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:59,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847830336] [2022-03-15 15:57:59,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847830336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:59,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023896183] [2022-03-15 15:57:59,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:59,711 INFO L229 MonitoredProcess]: Starting monitored process 620 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:59,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Waiting until timeout for monitored process [2022-03-15 15:57:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:57:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:59,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:59,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:57:59,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:59,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:57:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:59,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:00,093 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:00,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-15 15:58:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:58:00,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023896183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:00,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:00,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:58:00,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124672556] [2022-03-15 15:58:00,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:00,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:00,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:00,107 INFO L87 Difference]: Start difference. First operand 695 states and 1886 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:00,210 INFO L93 Difference]: Finished difference Result 779 states and 2069 transitions. [2022-03-15 15:58:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:58:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:00,211 INFO L225 Difference]: With dead ends: 779 [2022-03-15 15:58:00,211 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 15:58:00,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:00,211 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:00,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-03-15 15:58:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 15:58:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 695. [2022-03-15 15:58:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.717579250720461) internal successors, (1886), 694 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1886 transitions. [2022-03-15 15:58:00,218 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1886 transitions. Word has length 20 [2022-03-15 15:58:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:00,218 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1886 transitions. [2022-03-15 15:58:00,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1886 transitions. [2022-03-15 15:58:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:00,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:00,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:00,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:00,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,620 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:00,420 INFO L402 AbstractCegarLoop]: === Iteration 626 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 796522978, now seen corresponding path program 620 times [2022-03-15 15:58:00,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:00,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556292160] [2022-03-15 15:58:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:00,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:00,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556292160] [2022-03-15 15:58:00,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556292160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:00,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327818726] [2022-03-15 15:58:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:00,631 INFO L229 MonitoredProcess]: Starting monitored process 621 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:00,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Waiting until timeout for monitored process [2022-03-15 15:58:00,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:00,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:00,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:00,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:00,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:58:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:00,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:01,303 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:01,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:01,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:01,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327818726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:01,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:01,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:01,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101183752] [2022-03-15 15:58:01,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:01,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:01,377 INFO L87 Difference]: Start difference. First operand 695 states and 1886 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:02,026 INFO L93 Difference]: Finished difference Result 888 states and 2261 transitions. [2022-03-15 15:58:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:58:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:02,027 INFO L225 Difference]: With dead ends: 888 [2022-03-15 15:58:02,027 INFO L226 Difference]: Without dead ends: 868 [2022-03-15 15:58:02,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:02,028 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:02,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 390 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1001 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2022-03-15 15:58:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-03-15 15:58:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 718. [2022-03-15 15:58:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.712691771269177) internal successors, (1945), 717 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1945 transitions. [2022-03-15 15:58:02,035 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1945 transitions. Word has length 20 [2022-03-15 15:58:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:02,035 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1945 transitions. [2022-03-15 15:58:02,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1945 transitions. [2022-03-15 15:58:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:02,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:02,036 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:02,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Ended with exit code 0 [2022-03-15 15:58:02,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,621 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:02,252 INFO L402 AbstractCegarLoop]: === Iteration 627 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash -121427212, now seen corresponding path program 621 times [2022-03-15 15:58:02,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:02,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972183118] [2022-03-15 15:58:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:02,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:02,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:02,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972183118] [2022-03-15 15:58:02,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972183118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:02,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253399795] [2022-03-15 15:58:02,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:02,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:02,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:02,427 INFO L229 MonitoredProcess]: Starting monitored process 622 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:02,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Waiting until timeout for monitored process [2022-03-15 15:58:02,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:02,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:02,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:02,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:02,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:58:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:02,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:03,207 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:03,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:03,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:03,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253399795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:03,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:03,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:03,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562901265] [2022-03-15 15:58:03,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:03,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:03,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:03,289 INFO L87 Difference]: Start difference. First operand 718 states and 1945 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:03,965 INFO L93 Difference]: Finished difference Result 881 states and 2245 transitions. [2022-03-15 15:58:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:58:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:03,967 INFO L225 Difference]: With dead ends: 881 [2022-03-15 15:58:03,967 INFO L226 Difference]: Without dead ends: 872 [2022-03-15 15:58:03,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:03,967 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:03,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 434 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1071 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-03-15 15:58:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-03-15 15:58:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 718. [2022-03-15 15:58:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.711297071129707) internal successors, (1944), 717 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1944 transitions. [2022-03-15 15:58:03,974 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1944 transitions. Word has length 20 [2022-03-15 15:58:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:03,974 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1944 transitions. [2022-03-15 15:58:03,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1944 transitions. [2022-03-15 15:58:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:03,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:03,975 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:03,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:04,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable626 [2022-03-15 15:58:04,191 INFO L402 AbstractCegarLoop]: === Iteration 628 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:04,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1813606494, now seen corresponding path program 622 times [2022-03-15 15:58:04,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:04,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488951348] [2022-03-15 15:58:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:04,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488951348] [2022-03-15 15:58:04,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488951348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:04,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309347810] [2022-03-15 15:58:04,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:04,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:04,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:04,332 INFO L229 MonitoredProcess]: Starting monitored process 623 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:04,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Waiting until timeout for monitored process [2022-03-15 15:58:04,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:04,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:04,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:04,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:04,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:04,893 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:04,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:04,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309347810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:04,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:04,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:04,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389166631] [2022-03-15 15:58:04,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:04,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:04,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:04,951 INFO L87 Difference]: Start difference. First operand 718 states and 1944 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:05,490 INFO L93 Difference]: Finished difference Result 878 states and 2240 transitions. [2022-03-15 15:58:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:58:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:05,491 INFO L225 Difference]: With dead ends: 878 [2022-03-15 15:58:05,491 INFO L226 Difference]: Without dead ends: 864 [2022-03-15 15:58:05,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:05,491 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:05,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 408 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1037 Invalid, 0 Unknown, 180 Unchecked, 0.3s Time] [2022-03-15 15:58:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-15 15:58:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 704. [2022-03-15 15:58:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.7197724039829305) internal successors, (1912), 703 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1912 transitions. [2022-03-15 15:58:05,499 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1912 transitions. Word has length 20 [2022-03-15 15:58:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:05,499 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1912 transitions. [2022-03-15 15:58:05,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1912 transitions. [2022-03-15 15:58:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:05,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:05,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:05,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2022-03-15 15:58:05,715 INFO L402 AbstractCegarLoop]: === Iteration 629 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1700858858, now seen corresponding path program 623 times [2022-03-15 15:58:05,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:05,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437654625] [2022-03-15 15:58:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:05,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:05,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437654625] [2022-03-15 15:58:05,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437654625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:05,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206580320] [2022-03-15 15:58:05,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:05,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:05,876 INFO L229 MonitoredProcess]: Starting monitored process 624 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:05,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Waiting until timeout for monitored process [2022-03-15 15:58:05,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:05,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:06,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:06,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:06,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:06,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:06,480 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:06,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:06,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206580320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:06,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:06,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:06,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679752182] [2022-03-15 15:58:06,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:06,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:06,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:06,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:06,539 INFO L87 Difference]: Start difference. First operand 704 states and 1912 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:07,071 INFO L93 Difference]: Finished difference Result 834 states and 2167 transitions. [2022-03-15 15:58:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:58:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:07,072 INFO L225 Difference]: With dead ends: 834 [2022-03-15 15:58:07,072 INFO L226 Difference]: Without dead ends: 811 [2022-03-15 15:58:07,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:58:07,072 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:07,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 457 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1290 Invalid, 0 Unknown, 329 Unchecked, 0.4s Time] [2022-03-15 15:58:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-03-15 15:58:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 704. [2022-03-15 15:58:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.7183499288762447) internal successors, (1911), 703 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1911 transitions. [2022-03-15 15:58:07,080 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1911 transitions. Word has length 20 [2022-03-15 15:58:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:07,080 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1911 transitions. [2022-03-15 15:58:07,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1911 transitions. [2022-03-15 15:58:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:07,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:07,080 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:07,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:07,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,624 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:07,296 INFO L402 AbstractCegarLoop]: === Iteration 630 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1365777566, now seen corresponding path program 624 times [2022-03-15 15:58:07,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:07,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948830318] [2022-03-15 15:58:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:07,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:07,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:07,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948830318] [2022-03-15 15:58:07,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948830318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:07,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048806067] [2022-03-15 15:58:07,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:07,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:07,503 INFO L229 MonitoredProcess]: Starting monitored process 625 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:07,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Waiting until timeout for monitored process [2022-03-15 15:58:07,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:07,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:07,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:58:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:07,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:07,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:07,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:07,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:08,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:08,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:58:08,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:08,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:58:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:08,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048806067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:08,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:08,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-03-15 15:58:08,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12283918] [2022-03-15 15:58:08,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:08,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:58:08,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:08,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:58:08,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:08,458 INFO L87 Difference]: Start difference. First operand 704 states and 1911 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:08,873 INFO L93 Difference]: Finished difference Result 801 states and 2117 transitions. [2022-03-15 15:58:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:08,874 INFO L225 Difference]: With dead ends: 801 [2022-03-15 15:58:08,874 INFO L226 Difference]: Without dead ends: 794 [2022-03-15 15:58:08,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:08,875 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:08,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 197 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 717 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-03-15 15:58:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-15 15:58:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 704. [2022-03-15 15:58:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.7183499288762447) internal successors, (1911), 703 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1911 transitions. [2022-03-15 15:58:08,882 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1911 transitions. Word has length 20 [2022-03-15 15:58:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:08,882 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1911 transitions. [2022-03-15 15:58:08,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1911 transitions. [2022-03-15 15:58:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:08,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:08,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:08,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:09,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,625 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:09,095 INFO L402 AbstractCegarLoop]: === Iteration 631 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 861788822, now seen corresponding path program 625 times [2022-03-15 15:58:09,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:09,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522800535] [2022-03-15 15:58:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:09,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522800535] [2022-03-15 15:58:09,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522800535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:09,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253553581] [2022-03-15 15:58:09,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:09,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:09,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:09,310 INFO L229 MonitoredProcess]: Starting monitored process 626 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:09,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Waiting until timeout for monitored process [2022-03-15 15:58:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:09,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:09,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:09,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:58:09,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:09,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:10,142 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:10,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:58:10,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:58:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:10,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253553581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:10,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:10,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:10,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361861116] [2022-03-15 15:58:10,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:10,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:10,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:10,203 INFO L87 Difference]: Start difference. First operand 704 states and 1911 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:11,854 INFO L93 Difference]: Finished difference Result 972 states and 2388 transitions. [2022-03-15 15:58:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:58:11,854 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:11,855 INFO L225 Difference]: With dead ends: 972 [2022-03-15 15:58:11,855 INFO L226 Difference]: Without dead ends: 925 [2022-03-15 15:58:11,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:58:11,856 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 120 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:11,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 482 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1359 Invalid, 0 Unknown, 252 Unchecked, 0.4s Time] [2022-03-15 15:58:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-03-15 15:58:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 709. [2022-03-15 15:58:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.7231638418079096) internal successors, (1928), 708 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1928 transitions. [2022-03-15 15:58:11,870 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1928 transitions. Word has length 20 [2022-03-15 15:58:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:11,870 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1928 transitions. [2022-03-15 15:58:11,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1928 transitions. [2022-03-15 15:58:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:11,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:11,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:11,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:12,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2022-03-15 15:58:12,083 INFO L402 AbstractCegarLoop]: === Iteration 632 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1708310158, now seen corresponding path program 626 times [2022-03-15 15:58:12,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:12,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528439196] [2022-03-15 15:58:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:12,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:12,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528439196] [2022-03-15 15:58:12,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528439196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:12,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151641894] [2022-03-15 15:58:12,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:12,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:12,284 INFO L229 MonitoredProcess]: Starting monitored process 627 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:12,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Waiting until timeout for monitored process [2022-03-15 15:58:12,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:12,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:12,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:12,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:12,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:12,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:12,891 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:12,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:12,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151641894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:12,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:12,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:12,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470675734] [2022-03-15 15:58:12,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:12,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:12,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:12,964 INFO L87 Difference]: Start difference. First operand 709 states and 1928 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:13,493 INFO L93 Difference]: Finished difference Result 974 states and 2456 transitions. [2022-03-15 15:58:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:58:13,494 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:13,495 INFO L225 Difference]: With dead ends: 974 [2022-03-15 15:58:13,495 INFO L226 Difference]: Without dead ends: 950 [2022-03-15 15:58:13,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:13,495 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 63 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:13,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 560 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1041 Invalid, 0 Unknown, 201 Unchecked, 0.3s Time] [2022-03-15 15:58:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-03-15 15:58:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 739. [2022-03-15 15:58:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.7249322493224932) internal successors, (2011), 738 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2011 transitions. [2022-03-15 15:58:13,503 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2011 transitions. Word has length 20 [2022-03-15 15:58:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:13,504 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2011 transitions. [2022-03-15 15:58:13,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2011 transitions. [2022-03-15 15:58:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:13,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:13,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:13,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Ended with exit code 0 [2022-03-15 15:58:13,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2022-03-15 15:58:13,718 INFO L402 AbstractCegarLoop]: === Iteration 633 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:13,718 INFO L85 PathProgramCache]: Analyzing trace with hash 16130876, now seen corresponding path program 627 times [2022-03-15 15:58:13,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:13,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398756973] [2022-03-15 15:58:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:13,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:13,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398756973] [2022-03-15 15:58:13,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398756973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:13,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035802489] [2022-03-15 15:58:13,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:13,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:13,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:13,930 INFO L229 MonitoredProcess]: Starting monitored process 628 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:13,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Waiting until timeout for monitored process [2022-03-15 15:58:13,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:58:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:14,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:14,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:14,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:58:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:14,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:14,640 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:14,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:14,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:14,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035802489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:14,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:14,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:14,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054831328] [2022-03-15 15:58:14,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:14,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:14,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:14,757 INFO L87 Difference]: Start difference. First operand 739 states and 2011 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:15,532 INFO L93 Difference]: Finished difference Result 959 states and 2424 transitions. [2022-03-15 15:58:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:58:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:15,533 INFO L225 Difference]: With dead ends: 959 [2022-03-15 15:58:15,533 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 15:58:15,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:58:15,534 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:15,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 496 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1053 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2022-03-15 15:58:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 15:58:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 731. [2022-03-15 15:58:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 2.728767123287671) internal successors, (1992), 730 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1992 transitions. [2022-03-15 15:58:15,541 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1992 transitions. Word has length 20 [2022-03-15 15:58:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:15,541 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1992 transitions. [2022-03-15 15:58:15,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1992 transitions. [2022-03-15 15:58:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:15,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:15,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:15,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:15,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2022-03-15 15:58:15,758 INFO L402 AbstractCegarLoop]: === Iteration 634 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2043391450, now seen corresponding path program 628 times [2022-03-15 15:58:15,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:15,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590405935] [2022-03-15 15:58:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:15,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:15,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:15,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590405935] [2022-03-15 15:58:15,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590405935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:15,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497279838] [2022-03-15 15:58:15,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:15,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:15,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:15,972 INFO L229 MonitoredProcess]: Starting monitored process 629 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:15,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Waiting until timeout for monitored process [2022-03-15 15:58:15,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:16,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:16,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:16,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:16,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:16,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:16,654 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:16,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:16,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:16,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497279838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:16,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:16,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:58:16,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811879857] [2022-03-15 15:58:16,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:16,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:58:16,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:58:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:16,743 INFO L87 Difference]: Start difference. First operand 731 states and 1992 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:17,599 INFO L93 Difference]: Finished difference Result 987 states and 2468 transitions. [2022-03-15 15:58:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:58:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:17,601 INFO L225 Difference]: With dead ends: 987 [2022-03-15 15:58:17,601 INFO L226 Difference]: Without dead ends: 961 [2022-03-15 15:58:17,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:58:17,601 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:17,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 561 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1392 Invalid, 0 Unknown, 205 Unchecked, 0.5s Time] [2022-03-15 15:58:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-03-15 15:58:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 734. [2022-03-15 15:58:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.727148703956344) internal successors, (1999), 733 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1999 transitions. [2022-03-15 15:58:17,623 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1999 transitions. Word has length 20 [2022-03-15 15:58:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:17,623 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1999 transitions. [2022-03-15 15:58:17,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1999 transitions. [2022-03-15 15:58:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:17,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:17,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:17,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Ended with exit code 0 [2022-03-15 15:58:17,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2022-03-15 15:58:17,832 INFO L402 AbstractCegarLoop]: === Iteration 635 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash -24009458, now seen corresponding path program 629 times [2022-03-15 15:58:17,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:17,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255656198] [2022-03-15 15:58:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:17,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255656198] [2022-03-15 15:58:17,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255656198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510922804] [2022-03-15 15:58:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:17,987 INFO L229 MonitoredProcess]: Starting monitored process 630 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Waiting until timeout for monitored process [2022-03-15 15:58:18,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:58:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:18,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:18,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:58:18,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:18,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:18,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:18,569 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:18,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 15:58:18,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 15:58:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:18,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510922804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:18,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:18,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:18,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292031892] [2022-03-15 15:58:18,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:18,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:18,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:18,640 INFO L87 Difference]: Start difference. First operand 734 states and 1999 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:20,268 INFO L93 Difference]: Finished difference Result 1084 states and 2627 transitions. [2022-03-15 15:58:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:58:20,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:20,270 INFO L225 Difference]: With dead ends: 1084 [2022-03-15 15:58:20,270 INFO L226 Difference]: Without dead ends: 1044 [2022-03-15 15:58:20,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:58:20,270 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 154 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:20,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 606 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1643 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-03-15 15:58:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-03-15 15:58:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 735. [2022-03-15 15:58:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.726158038147139) internal successors, (2001), 734 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2001 transitions. [2022-03-15 15:58:20,278 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2001 transitions. Word has length 20 [2022-03-15 15:58:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:20,279 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2001 transitions. [2022-03-15 15:58:20,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2001 transitions. [2022-03-15 15:58:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:20,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:20,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:20,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:20,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,630 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:20,495 INFO L402 AbstractCegarLoop]: === Iteration 636 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash -63392670, now seen corresponding path program 630 times [2022-03-15 15:58:20,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:20,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264277824] [2022-03-15 15:58:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:20,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:20,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264277824] [2022-03-15 15:58:20,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264277824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:20,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920404077] [2022-03-15 15:58:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:20,624 INFO L229 MonitoredProcess]: Starting monitored process 631 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:20,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Waiting until timeout for monitored process [2022-03-15 15:58:20,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:58:20,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:20,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:20,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:20,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:20,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:21,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:21,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 119 [2022-03-15 15:58:21,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:21,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 91 [2022-03-15 15:58:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:21,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920404077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:21,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:21,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-03-15 15:58:21,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933574721] [2022-03-15 15:58:21,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:21,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:58:21,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:58:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:21,193 INFO L87 Difference]: Start difference. First operand 735 states and 2001 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:21,736 INFO L93 Difference]: Finished difference Result 840 states and 2224 transitions. [2022-03-15 15:58:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:58:21,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:21,737 INFO L225 Difference]: With dead ends: 840 [2022-03-15 15:58:21,737 INFO L226 Difference]: Without dead ends: 837 [2022-03-15 15:58:21,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:58:21,737 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:21,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 203 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 931 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-03-15 15:58:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-03-15 15:58:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 740. [2022-03-15 15:58:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.722598105548038) internal successors, (2012), 739 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2012 transitions. [2022-03-15 15:58:21,745 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2012 transitions. Word has length 20 [2022-03-15 15:58:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:21,745 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2012 transitions. [2022-03-15 15:58:21,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2012 transitions. [2022-03-15 15:58:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:21,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:21,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:21,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:21,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2022-03-15 15:58:21,961 INFO L402 AbstractCegarLoop]: === Iteration 637 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1780547084, now seen corresponding path program 631 times [2022-03-15 15:58:21,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:21,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400601071] [2022-03-15 15:58:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:22,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400601071] [2022-03-15 15:58:22,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400601071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:22,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861020286] [2022-03-15 15:58:22,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:22,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:22,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:22,091 INFO L229 MonitoredProcess]: Starting monitored process 632 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:22,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Waiting until timeout for monitored process [2022-03-15 15:58:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:22,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:22,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:22,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:22,586 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:22,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:58:22,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:58:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861020286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:22,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:22,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:22,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125693610] [2022-03-15 15:58:22,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:22,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:22,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:22,663 INFO L87 Difference]: Start difference. First operand 740 states and 2012 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:23,206 INFO L93 Difference]: Finished difference Result 1002 states and 2536 transitions. [2022-03-15 15:58:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:58:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:23,207 INFO L225 Difference]: With dead ends: 1002 [2022-03-15 15:58:23,207 INFO L226 Difference]: Without dead ends: 977 [2022-03-15 15:58:23,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:58:23,207 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:23,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 443 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1002 Invalid, 0 Unknown, 99 Unchecked, 0.3s Time] [2022-03-15 15:58:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-03-15 15:58:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 756. [2022-03-15 15:58:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.733774834437086) internal successors, (2064), 755 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2064 transitions. [2022-03-15 15:58:23,216 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2064 transitions. Word has length 20 [2022-03-15 15:58:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:23,216 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2064 transitions. [2022-03-15 15:58:23,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2064 transitions. [2022-03-15 15:58:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:23,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:23,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:23,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Ended with exit code 0 [2022-03-15 15:58:23,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable636 [2022-03-15 15:58:23,427 INFO L402 AbstractCegarLoop]: === Iteration 638 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2130793578, now seen corresponding path program 632 times [2022-03-15 15:58:23,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:23,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405554749] [2022-03-15 15:58:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:23,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:23,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405554749] [2022-03-15 15:58:23,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405554749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:23,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26882988] [2022-03-15 15:58:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:23,612 INFO L229 MonitoredProcess]: Starting monitored process 633 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Waiting until timeout for monitored process [2022-03-15 15:58:23,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:23,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:23,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:23,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:58:23,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:23,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:23,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:24,136 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:24,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 15:58:24,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 15:58:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:24,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26882988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:24,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:24,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:24,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670424263] [2022-03-15 15:58:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:24,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:24,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:24,223 INFO L87 Difference]: Start difference. First operand 756 states and 2064 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:25,582 INFO L93 Difference]: Finished difference Result 1122 states and 2722 transitions. [2022-03-15 15:58:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:58:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:25,584 INFO L225 Difference]: With dead ends: 1122 [2022-03-15 15:58:25,584 INFO L226 Difference]: Without dead ends: 1077 [2022-03-15 15:58:25,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=301, Invalid=2779, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:58:25,584 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 153 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:25,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 607 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1691 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2022-03-15 15:58:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-03-15 15:58:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 757. [2022-03-15 15:58:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.7261904761904763) internal successors, (2061), 756 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2061 transitions. [2022-03-15 15:58:25,593 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2061 transitions. Word has length 20 [2022-03-15 15:58:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:25,593 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2061 transitions. [2022-03-15 15:58:25,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2061 transitions. [2022-03-15 15:58:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:25,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:25,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:25,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:25,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,633 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:25,819 INFO L402 AbstractCegarLoop]: === Iteration 639 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 18002958, now seen corresponding path program 633 times [2022-03-15 15:58:25,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:25,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367846013] [2022-03-15 15:58:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:25,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:25,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367846013] [2022-03-15 15:58:25,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367846013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:25,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596512411] [2022-03-15 15:58:25,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:25,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:25,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:25,978 INFO L229 MonitoredProcess]: Starting monitored process 634 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:25,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Waiting until timeout for monitored process [2022-03-15 15:58:26,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:58:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:26,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:26,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:58:26,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:26,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:26,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:26,510 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:26,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 15:58:26,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 15:58:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:26,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596512411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:26,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:26,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:26,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879018211] [2022-03-15 15:58:26,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:26,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:26,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:26,576 INFO L87 Difference]: Start difference. First operand 757 states and 2061 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:28,091 INFO L93 Difference]: Finished difference Result 1161 states and 2833 transitions. [2022-03-15 15:58:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:58:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:28,093 INFO L225 Difference]: With dead ends: 1161 [2022-03-15 15:58:28,093 INFO L226 Difference]: Without dead ends: 1121 [2022-03-15 15:58:28,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=275, Invalid=3031, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:58:28,094 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 186 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:28,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 595 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:58:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-03-15 15:58:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 762. [2022-03-15 15:58:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.7201051248357424) internal successors, (2070), 761 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2070 transitions. [2022-03-15 15:58:28,102 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2070 transitions. Word has length 20 [2022-03-15 15:58:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:28,102 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2070 transitions. [2022-03-15 15:58:28,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2070 transitions. [2022-03-15 15:58:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:28,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:28,103 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:28,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Ended with exit code 0 [2022-03-15 15:58:28,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,634 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,319 INFO L402 AbstractCegarLoop]: === Iteration 640 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1498418474, now seen corresponding path program 634 times [2022-03-15 15:58:28,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:28,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520434883] [2022-03-15 15:58:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:28,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:58:28,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:28,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520434883] [2022-03-15 15:58:28,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520434883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:28,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523643347] [2022-03-15 15:58:28,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:28,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:28,403 INFO L229 MonitoredProcess]: Starting monitored process 635 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:28,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Waiting until timeout for monitored process [2022-03-15 15:58:28,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:28,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:58:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:28,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:28,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:58:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:28,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 15:58:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:58:28,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:28,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:28,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 15:58:28,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:28,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:58:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:58:28,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523643347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:28,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:28,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 15:58:28,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490571525] [2022-03-15 15:58:28,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:28,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:28,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:28,679 INFO L87 Difference]: Start difference. First operand 762 states and 2070 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:28,781 INFO L93 Difference]: Finished difference Result 823 states and 2195 transitions. [2022-03-15 15:58:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:58:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:28,782 INFO L225 Difference]: With dead ends: 823 [2022-03-15 15:58:28,783 INFO L226 Difference]: Without dead ends: 823 [2022-03-15 15:58:28,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:28,783 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:28,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 143 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 385 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-03-15 15:58:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-03-15 15:58:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 759. [2022-03-15 15:58:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.7189973614775726) internal successors, (2061), 758 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2061 transitions. [2022-03-15 15:58:28,797 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2061 transitions. Word has length 20 [2022-03-15 15:58:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2061 transitions. [2022-03-15 15:58:28,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2061 transitions. [2022-03-15 15:58:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:28,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:28,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:28,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:29,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 635 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2022-03-15 15:58:29,014 INFO L402 AbstractCegarLoop]: === Iteration 641 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 45288180, now seen corresponding path program 635 times [2022-03-15 15:58:29,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:29,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636414586] [2022-03-15 15:58:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:29,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636414586] [2022-03-15 15:58:29,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636414586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:29,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751219557] [2022-03-15 15:58:29,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:29,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:29,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:29,167 INFO L229 MonitoredProcess]: Starting monitored process 636 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:29,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Waiting until timeout for monitored process [2022-03-15 15:58:29,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:29,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:29,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:29,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:29,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:29,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:29,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:58:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:29,768 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:29,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:29,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751219557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:29,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:29,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:58:29,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578874181] [2022-03-15 15:58:29,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:29,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:29,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:29,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:29,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:29,847 INFO L87 Difference]: Start difference. First operand 759 states and 2061 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:30,312 INFO L93 Difference]: Finished difference Result 969 states and 2469 transitions. [2022-03-15 15:58:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:58:30,313 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:30,314 INFO L225 Difference]: With dead ends: 969 [2022-03-15 15:58:30,314 INFO L226 Difference]: Without dead ends: 946 [2022-03-15 15:58:30,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:58:30,314 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:30,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 516 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1052 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2022-03-15 15:58:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-15 15:58:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 798. [2022-03-15 15:58:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 2.7013801756587204) internal successors, (2153), 797 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2153 transitions. [2022-03-15 15:58:30,323 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2153 transitions. Word has length 20 [2022-03-15 15:58:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:30,323 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2153 transitions. [2022-03-15 15:58:30,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2153 transitions. [2022-03-15 15:58:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:30,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:30,324 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:30,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2022-03-15 15:58:30,539 INFO L402 AbstractCegarLoop]: === Iteration 642 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 735653172, now seen corresponding path program 636 times [2022-03-15 15:58:30,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:30,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140693581] [2022-03-15 15:58:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:30,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:30,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140693581] [2022-03-15 15:58:30,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140693581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:30,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536236055] [2022-03-15 15:58:30,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:30,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:30,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:30,692 INFO L229 MonitoredProcess]: Starting monitored process 637 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:30,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Waiting until timeout for monitored process [2022-03-15 15:58:30,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:30,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:58:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:31,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:31,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:31,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:31,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:31,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:31,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:58:31,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:31,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:58:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:31,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536236055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:31,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:31,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:58:31,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491706260] [2022-03-15 15:58:31,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:31,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:31,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:31,758 INFO L87 Difference]: Start difference. First operand 798 states and 2153 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:32,114 INFO L93 Difference]: Finished difference Result 845 states and 2248 transitions. [2022-03-15 15:58:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:32,115 INFO L225 Difference]: With dead ends: 845 [2022-03-15 15:58:32,115 INFO L226 Difference]: Without dead ends: 842 [2022-03-15 15:58:32,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:32,115 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:32,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 246 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 729 Invalid, 0 Unknown, 328 Unchecked, 0.3s Time] [2022-03-15 15:58:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-15 15:58:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 794. [2022-03-15 15:58:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.707440100882724) internal successors, (2147), 793 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2147 transitions. [2022-03-15 15:58:32,123 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2147 transitions. Word has length 20 [2022-03-15 15:58:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:32,123 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 2147 transitions. [2022-03-15 15:58:32,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2147 transitions. [2022-03-15 15:58:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:32,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:32,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:32,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Ended with exit code 0 [2022-03-15 15:58:32,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 637 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2022-03-15 15:58:32,340 INFO L402 AbstractCegarLoop]: === Iteration 643 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash -64137408, now seen corresponding path program 637 times [2022-03-15 15:58:32,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:32,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186490647] [2022-03-15 15:58:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:32,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:32,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:32,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186490647] [2022-03-15 15:58:32,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186490647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:32,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358562452] [2022-03-15 15:58:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:32,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:32,529 INFO L229 MonitoredProcess]: Starting monitored process 638 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:32,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Waiting until timeout for monitored process [2022-03-15 15:58:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:32,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:32,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:32,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:32,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:32,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:33,319 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:33,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:33,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:33,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358562452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:33,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:33,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:58:33,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408539031] [2022-03-15 15:58:33,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:33,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:33,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:33,388 INFO L87 Difference]: Start difference. First operand 794 states and 2147 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:34,021 INFO L93 Difference]: Finished difference Result 953 states and 2460 transitions. [2022-03-15 15:58:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:58:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:34,022 INFO L225 Difference]: With dead ends: 953 [2022-03-15 15:58:34,022 INFO L226 Difference]: Without dead ends: 933 [2022-03-15 15:58:34,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:58:34,023 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:34,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 445 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1016 Invalid, 0 Unknown, 162 Unchecked, 0.4s Time] [2022-03-15 15:58:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-03-15 15:58:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 812. [2022-03-15 15:58:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 2.7003699136868065) internal successors, (2190), 811 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2190 transitions. [2022-03-15 15:58:34,031 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2190 transitions. Word has length 20 [2022-03-15 15:58:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:34,031 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 2190 transitions. [2022-03-15 15:58:34,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2190 transitions. [2022-03-15 15:58:34,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:34,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:34,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:34,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:34,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable642,638 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:34,233 INFO L402 AbstractCegarLoop]: === Iteration 644 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1620700416, now seen corresponding path program 638 times [2022-03-15 15:58:34,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:34,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47421072] [2022-03-15 15:58:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:34,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:34,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47421072] [2022-03-15 15:58:34,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47421072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:34,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535461291] [2022-03-15 15:58:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:34,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:34,421 INFO L229 MonitoredProcess]: Starting monitored process 639 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:34,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Waiting until timeout for monitored process [2022-03-15 15:58:34,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:34,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:34,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:34,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:34,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:34,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:35,057 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:35,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:35,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:35,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535461291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:35,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:35,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:58:35,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871208706] [2022-03-15 15:58:35,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:35,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:35,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:35,115 INFO L87 Difference]: Start difference. First operand 812 states and 2190 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:35,561 INFO L93 Difference]: Finished difference Result 951 states and 2449 transitions. [2022-03-15 15:58:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:58:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:35,563 INFO L225 Difference]: With dead ends: 951 [2022-03-15 15:58:35,563 INFO L226 Difference]: Without dead ends: 937 [2022-03-15 15:58:35,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:58:35,563 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:35,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 463 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 996 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-03-15 15:58:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-03-15 15:58:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 798. [2022-03-15 15:58:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 2.7089084065244666) internal successors, (2159), 797 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2159 transitions. [2022-03-15 15:58:35,572 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2159 transitions. Word has length 20 [2022-03-15 15:58:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:35,572 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2159 transitions. [2022-03-15 15:58:35,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2159 transitions. [2022-03-15 15:58:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:35,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:35,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:35,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Ended with exit code 0 [2022-03-15 15:58:35,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,639 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:35,786 INFO L402 AbstractCegarLoop]: === Iteration 645 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1733448052, now seen corresponding path program 639 times [2022-03-15 15:58:35,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:35,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820169805] [2022-03-15 15:58:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:36,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820169805] [2022-03-15 15:58:36,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820169805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:36,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193770752] [2022-03-15 15:58:36,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:36,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:36,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:36,030 INFO L229 MonitoredProcess]: Starting monitored process 640 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:36,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Waiting until timeout for monitored process [2022-03-15 15:58:36,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:36,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:36,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:36,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:36,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:36,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:58:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:36,981 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:36,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:58:36,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:58:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193770752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:37,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:37,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:58:37,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033696425] [2022-03-15 15:58:37,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:37,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:37,057 INFO L87 Difference]: Start difference. First operand 798 states and 2159 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:37,678 INFO L93 Difference]: Finished difference Result 974 states and 2471 transitions. [2022-03-15 15:58:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:58:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:37,679 INFO L225 Difference]: With dead ends: 974 [2022-03-15 15:58:37,679 INFO L226 Difference]: Without dead ends: 951 [2022-03-15 15:58:37,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:58:37,679 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:37,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 501 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1098 Invalid, 0 Unknown, 237 Unchecked, 0.4s Time] [2022-03-15 15:58:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-03-15 15:58:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 801. [2022-03-15 15:58:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 2.71) internal successors, (2168), 800 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2168 transitions. [2022-03-15 15:58:37,687 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2168 transitions. Word has length 20 [2022-03-15 15:58:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:37,687 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2168 transitions. [2022-03-15 15:58:37,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2168 transitions. [2022-03-15 15:58:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:37,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:37,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:37,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:37,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,640 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:37,904 INFO L402 AbstractCegarLoop]: === Iteration 646 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2068529344, now seen corresponding path program 640 times [2022-03-15 15:58:37,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:37,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825064123] [2022-03-15 15:58:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:38,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825064123] [2022-03-15 15:58:38,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825064123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:38,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779050588] [2022-03-15 15:58:38,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:38,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:38,092 INFO L229 MonitoredProcess]: Starting monitored process 641 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:38,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Waiting until timeout for monitored process [2022-03-15 15:58:38,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:38,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:38,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:38,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:38,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:38,945 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:38,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:58:38,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:58:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779050588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:39,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:39,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:58:39,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656340958] [2022-03-15 15:58:39,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:39,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:39,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:39,033 INFO L87 Difference]: Start difference. First operand 801 states and 2168 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:39,676 INFO L93 Difference]: Finished difference Result 973 states and 2476 transitions. [2022-03-15 15:58:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:58:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:39,677 INFO L225 Difference]: With dead ends: 973 [2022-03-15 15:58:39,677 INFO L226 Difference]: Without dead ends: 953 [2022-03-15 15:58:39,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:39,677 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:39,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 451 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1065 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-03-15 15:58:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-15 15:58:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 803. [2022-03-15 15:58:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.71072319201995) internal successors, (2174), 802 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2174 transitions. [2022-03-15 15:58:39,686 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2174 transitions. Word has length 20 [2022-03-15 15:58:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:39,686 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2174 transitions. [2022-03-15 15:58:39,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2174 transitions. [2022-03-15 15:58:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:39,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:39,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:39,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:39,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2022-03-15 15:58:39,895 INFO L402 AbstractCegarLoop]: === Iteration 647 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1128436, now seen corresponding path program 641 times [2022-03-15 15:58:39,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:39,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620616303] [2022-03-15 15:58:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:39,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:40,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620616303] [2022-03-15 15:58:40,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620616303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:40,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135327411] [2022-03-15 15:58:40,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:40,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:40,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:40,192 INFO L229 MonitoredProcess]: Starting monitored process 642 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:40,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Waiting until timeout for monitored process [2022-03-15 15:58:40,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:58:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:40,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:58:40,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:40,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:41,331 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:41,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 15:58:41,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 15:58:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135327411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:41,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:41,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:58:41,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571417578] [2022-03-15 15:58:41,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:41,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:41,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:41,417 INFO L87 Difference]: Start difference. First operand 803 states and 2174 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:43,838 INFO L93 Difference]: Finished difference Result 1106 states and 2706 transitions. [2022-03-15 15:58:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:58:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:43,839 INFO L225 Difference]: With dead ends: 1106 [2022-03-15 15:58:43,839 INFO L226 Difference]: Without dead ends: 1059 [2022-03-15 15:58:43,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:58:43,839 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:43,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 572 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1357 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2022-03-15 15:58:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-03-15 15:58:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 801. [2022-03-15 15:58:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 2.70875) internal successors, (2167), 800 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2167 transitions. [2022-03-15 15:58:43,848 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2167 transitions. Word has length 20 [2022-03-15 15:58:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:43,848 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2167 transitions. [2022-03-15 15:58:43,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2167 transitions. [2022-03-15 15:58:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:43,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:43,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:43,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:44,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2022-03-15 15:58:44,059 INFO L402 AbstractCegarLoop]: === Iteration 648 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1692264512, now seen corresponding path program 642 times [2022-03-15 15:58:44,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:44,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906085758] [2022-03-15 15:58:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:44,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:44,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906085758] [2022-03-15 15:58:44,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906085758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:44,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939391324] [2022-03-15 15:58:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:44,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:44,284 INFO L229 MonitoredProcess]: Starting monitored process 643 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:44,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Waiting until timeout for monitored process [2022-03-15 15:58:44,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:44,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:44,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:58:44,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:44,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:44,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:44,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:58:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:44,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:44,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:58:44,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:44,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:58:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939391324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:45,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:45,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 15:58:45,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2472697] [2022-03-15 15:58:45,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:45,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:58:45,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:58:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:45,004 INFO L87 Difference]: Start difference. First operand 801 states and 2167 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:45,388 INFO L93 Difference]: Finished difference Result 873 states and 2309 transitions. [2022-03-15 15:58:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:58:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:45,389 INFO L225 Difference]: With dead ends: 873 [2022-03-15 15:58:45,390 INFO L226 Difference]: Without dead ends: 870 [2022-03-15 15:58:45,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:58:45,390 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:45,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 191 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 643 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-03-15 15:58:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-03-15 15:58:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 804. [2022-03-15 15:58:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.7073474470734746) internal successors, (2174), 803 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2174 transitions. [2022-03-15 15:58:45,398 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2174 transitions. Word has length 20 [2022-03-15 15:58:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:45,398 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2174 transitions. [2022-03-15 15:58:45,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2174 transitions. [2022-03-15 15:58:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:45,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:45,399 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:45,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:45,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,643 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:45,607 INFO L402 AbstractCegarLoop]: === Iteration 649 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash 774314322, now seen corresponding path program 643 times [2022-03-15 15:58:45,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:45,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045927885] [2022-03-15 15:58:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:45,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045927885] [2022-03-15 15:58:45,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045927885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:45,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003684340] [2022-03-15 15:58:45,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:45,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:45,829 INFO L229 MonitoredProcess]: Starting monitored process 644 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:45,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Waiting until timeout for monitored process [2022-03-15 15:58:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:46,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:46,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:46,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:58:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:46,540 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:46,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:58:46,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:58:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003684340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:46,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:46,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:46,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352199779] [2022-03-15 15:58:46,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:46,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:46,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:46,611 INFO L87 Difference]: Start difference. First operand 804 states and 2174 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:47,266 INFO L93 Difference]: Finished difference Result 1003 states and 2550 transitions. [2022-03-15 15:58:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:58:47,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:47,268 INFO L225 Difference]: With dead ends: 1003 [2022-03-15 15:58:47,268 INFO L226 Difference]: Without dead ends: 979 [2022-03-15 15:58:47,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:58:47,268 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:47,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 518 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1097 Invalid, 0 Unknown, 308 Unchecked, 0.4s Time] [2022-03-15 15:58:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-03-15 15:58:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 826. [2022-03-15 15:58:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.696969696969697) internal successors, (2225), 825 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2225 transitions. [2022-03-15 15:58:47,276 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2225 transitions. Word has length 20 [2022-03-15 15:58:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:47,276 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2225 transitions. [2022-03-15 15:58:47,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2225 transitions. [2022-03-15 15:58:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:47,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:47,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:47,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:47,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable648 [2022-03-15 15:58:47,481 INFO L402 AbstractCegarLoop]: === Iteration 650 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash -917864960, now seen corresponding path program 644 times [2022-03-15 15:58:47,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:47,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128051865] [2022-03-15 15:58:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:47,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128051865] [2022-03-15 15:58:47,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128051865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:47,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112744669] [2022-03-15 15:58:47,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:47,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:47,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:47,700 INFO L229 MonitoredProcess]: Starting monitored process 645 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:47,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Waiting until timeout for monitored process [2022-03-15 15:58:47,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:47,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:47,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:47,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:47,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:47,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:48,431 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:48,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:48,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112744669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:48,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:48,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:48,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307205926] [2022-03-15 15:58:48,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:48,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:48,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:48,517 INFO L87 Difference]: Start difference. First operand 826 states and 2225 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:49,051 INFO L93 Difference]: Finished difference Result 962 states and 2471 transitions. [2022-03-15 15:58:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:58:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:49,053 INFO L225 Difference]: With dead ends: 962 [2022-03-15 15:58:49,053 INFO L226 Difference]: Without dead ends: 944 [2022-03-15 15:58:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:58:49,053 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:49,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 476 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1143 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-03-15 15:58:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-03-15 15:58:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 814. [2022-03-15 15:58:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.7072570725707257) internal successors, (2201), 813 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2201 transitions. [2022-03-15 15:58:49,061 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2201 transitions. Word has length 20 [2022-03-15 15:58:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:49,061 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 2201 transitions. [2022-03-15 15:58:49,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2201 transitions. [2022-03-15 15:58:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:49,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:49,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:49,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:49,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,645 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:49,263 INFO L402 AbstractCegarLoop]: === Iteration 651 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -805117324, now seen corresponding path program 645 times [2022-03-15 15:58:49,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:49,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646562743] [2022-03-15 15:58:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:49,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646562743] [2022-03-15 15:58:49,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646562743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:49,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070354605] [2022-03-15 15:58:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:49,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:49,472 INFO L229 MonitoredProcess]: Starting monitored process 646 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:49,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (646)] Waiting until timeout for monitored process [2022-03-15 15:58:49,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:49,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:49,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:49,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:49,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:50,174 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:50,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:58:50,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:58:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070354605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:50,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:50,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:50,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095967213] [2022-03-15 15:58:50,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:50,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:50,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:50,267 INFO L87 Difference]: Start difference. First operand 814 states and 2201 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:51,050 INFO L93 Difference]: Finished difference Result 984 states and 2512 transitions. [2022-03-15 15:58:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:58:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:51,052 INFO L225 Difference]: With dead ends: 984 [2022-03-15 15:58:51,052 INFO L226 Difference]: Without dead ends: 965 [2022-03-15 15:58:51,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:58:51,052 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:51,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 425 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1149 Invalid, 0 Unknown, 171 Unchecked, 0.4s Time] [2022-03-15 15:58:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-03-15 15:58:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 824. [2022-03-15 15:58:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.7059538274605104) internal successors, (2227), 823 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2227 transitions. [2022-03-15 15:58:51,061 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2227 transitions. Word has length 20 [2022-03-15 15:58:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2227 transitions. [2022-03-15 15:58:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2227 transitions. [2022-03-15 15:58:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:51,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:51,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:51,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (646)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:51,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2022-03-15 15:58:51,278 INFO L402 AbstractCegarLoop]: === Iteration 652 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1797670690, now seen corresponding path program 646 times [2022-03-15 15:58:51,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:51,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268737749] [2022-03-15 15:58:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:51,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268737749] [2022-03-15 15:58:51,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268737749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:51,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135383123] [2022-03-15 15:58:51,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:51,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:51,470 INFO L229 MonitoredProcess]: Starting monitored process 647 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:51,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (647)] Waiting until timeout for monitored process [2022-03-15 15:58:51,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:51,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:51,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:51,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:51,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:52,253 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:52,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:52,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135383123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:52,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:52,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:52,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620564304] [2022-03-15 15:58:52,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:52,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:52,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:52,339 INFO L87 Difference]: Start difference. First operand 824 states and 2227 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:52,826 INFO L93 Difference]: Finished difference Result 929 states and 2422 transitions. [2022-03-15 15:58:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:58:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:52,828 INFO L225 Difference]: With dead ends: 929 [2022-03-15 15:58:52,828 INFO L226 Difference]: Without dead ends: 917 [2022-03-15 15:58:52,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:58:52,828 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:52,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 415 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 945 Invalid, 0 Unknown, 218 Unchecked, 0.3s Time] [2022-03-15 15:58:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-03-15 15:58:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 815. [2022-03-15 15:58:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.7063882063882065) internal successors, (2203), 814 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2203 transitions. [2022-03-15 15:58:52,836 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2203 transitions. Word has length 20 [2022-03-15 15:58:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:52,836 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2203 transitions. [2022-03-15 15:58:52,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2203 transitions. [2022-03-15 15:58:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:52,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:52,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:52,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (647)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:53,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,647 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:53,039 INFO L402 AbstractCegarLoop]: === Iteration 653 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash -470036032, now seen corresponding path program 647 times [2022-03-15 15:58:53,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:53,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613099944] [2022-03-15 15:58:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:53,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613099944] [2022-03-15 15:58:53,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613099944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:53,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574610955] [2022-03-15 15:58:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:53,270 INFO L229 MonitoredProcess]: Starting monitored process 648 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:53,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (648)] Waiting until timeout for monitored process [2022-03-15 15:58:53,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:53,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:53,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:53,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:53,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:54,079 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:54,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:54,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574610955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:54,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:54,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:54,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480404652] [2022-03-15 15:58:54,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:54,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:54,152 INFO L87 Difference]: Start difference. First operand 815 states and 2203 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:54,850 INFO L93 Difference]: Finished difference Result 973 states and 2489 transitions. [2022-03-15 15:58:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:58:54,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:54,852 INFO L225 Difference]: With dead ends: 973 [2022-03-15 15:58:54,852 INFO L226 Difference]: Without dead ends: 953 [2022-03-15 15:58:54,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:54,852 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:54,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 557 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1246 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2022-03-15 15:58:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-15 15:58:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 818. [2022-03-15 15:58:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 2.707466340269278) internal successors, (2212), 817 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2212 transitions. [2022-03-15 15:58:54,861 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2212 transitions. Word has length 20 [2022-03-15 15:58:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:54,861 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2212 transitions. [2022-03-15 15:58:54,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2212 transitions. [2022-03-15 15:58:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:54,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:54,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:54,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (648)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:55,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2022-03-15 15:58:55,073 INFO L402 AbstractCegarLoop]: === Iteration 654 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1757530356, now seen corresponding path program 648 times [2022-03-15 15:58:55,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:55,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945713875] [2022-03-15 15:58:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945713875] [2022-03-15 15:58:55,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945713875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045847499] [2022-03-15 15:58:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:55,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:55,302 INFO L229 MonitoredProcess]: Starting monitored process 649 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:55,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (649)] Waiting until timeout for monitored process [2022-03-15 15:58:55,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:55,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:55,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:58:55,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:55,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:55,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:58:55,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:55,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:58:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:56,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:56,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:58:56,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:56,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:58:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045847499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:56,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:56,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-03-15 15:58:56,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828083123] [2022-03-15 15:58:56,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:56,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:58:56,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:58:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:56,357 INFO L87 Difference]: Start difference. First operand 818 states and 2212 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:56,684 INFO L93 Difference]: Finished difference Result 864 states and 2306 transitions. [2022-03-15 15:58:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:56,685 INFO L225 Difference]: With dead ends: 864 [2022-03-15 15:58:56,685 INFO L226 Difference]: Without dead ends: 857 [2022-03-15 15:58:56,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:56,685 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:56,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 166 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 683 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2022-03-15 15:58:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-15 15:58:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 819. [2022-03-15 15:58:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.709046454767726) internal successors, (2216), 818 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2216 transitions. [2022-03-15 15:58:56,693 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2216 transitions. Word has length 20 [2022-03-15 15:58:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:56,693 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2216 transitions. [2022-03-15 15:58:56,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2216 transitions. [2022-03-15 15:58:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:56,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:56,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:56,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (649)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:56,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2022-03-15 15:58:56,907 INFO L402 AbstractCegarLoop]: === Iteration 655 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:56,907 INFO L85 PathProgramCache]: Analyzing trace with hash 914108788, now seen corresponding path program 649 times [2022-03-15 15:58:56,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:56,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440955389] [2022-03-15 15:58:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:56,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:57,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440955389] [2022-03-15 15:58:57,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440955389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:57,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466067751] [2022-03-15 15:58:57,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:57,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:57,042 INFO L229 MonitoredProcess]: Starting monitored process 650 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:57,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (650)] Waiting until timeout for monitored process [2022-03-15 15:58:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:57,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:57,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:58:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:57,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:58:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:57,563 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:57,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:58:57,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:58:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466067751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:57,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:57,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:57,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556545312] [2022-03-15 15:58:57,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:57,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:57,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:57,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:57,642 INFO L87 Difference]: Start difference. First operand 819 states and 2216 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:58,404 INFO L93 Difference]: Finished difference Result 1009 states and 2576 transitions. [2022-03-15 15:58:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:58:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:58:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:58,406 INFO L225 Difference]: With dead ends: 1009 [2022-03-15 15:58:58,406 INFO L226 Difference]: Without dead ends: 985 [2022-03-15 15:58:58,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:58:58,406 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:58,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 425 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1194 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2022-03-15 15:58:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-03-15 15:58:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 829. [2022-03-15 15:58:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.7028985507246377) internal successors, (2238), 828 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2238 transitions. [2022-03-15 15:58:58,415 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2238 transitions. Word has length 20 [2022-03-15 15:58:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:58,415 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 2238 transitions. [2022-03-15 15:58:58,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2238 transitions. [2022-03-15 15:58:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:58:58,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:58,416 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:58,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (650)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:58,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2022-03-15 15:58:58,632 INFO L402 AbstractCegarLoop]: === Iteration 656 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -778070494, now seen corresponding path program 650 times [2022-03-15 15:58:58,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:58,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250724648] [2022-03-15 15:58:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:58,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250724648] [2022-03-15 15:58:58,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250724648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:58,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300721738] [2022-03-15 15:58:58,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:58,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:58,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:58,767 INFO L229 MonitoredProcess]: Starting monitored process 651 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:58,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (651)] Waiting until timeout for monitored process [2022-03-15 15:58:58,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:58,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:58,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:58,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:58:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:59,298 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:58:59,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:58:59,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:58:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300721738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:59,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:59,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:58:59,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056273606] [2022-03-15 15:58:59,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:59,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:59,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:59,387 INFO L87 Difference]: Start difference. First operand 829 states and 2238 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:00,074 INFO L93 Difference]: Finished difference Result 972 states and 2484 transitions. [2022-03-15 15:59:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:59:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:00,076 INFO L225 Difference]: With dead ends: 972 [2022-03-15 15:59:00,076 INFO L226 Difference]: Without dead ends: 954 [2022-03-15 15:59:00,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:59:00,076 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:00,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 288 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 913 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2022-03-15 15:59:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-15 15:59:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 821. [2022-03-15 15:59:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.704878048780488) internal successors, (2218), 820 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2218 transitions. [2022-03-15 15:59:00,084 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2218 transitions. Word has length 20 [2022-03-15 15:59:00,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:00,084 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 2218 transitions. [2022-03-15 15:59:00,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2218 transitions. [2022-03-15 15:59:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:00,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:00,085 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:00,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (651)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:00,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2022-03-15 15:59:00,301 INFO L402 AbstractCegarLoop]: === Iteration 657 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1249190080, now seen corresponding path program 651 times [2022-03-15 15:59:00,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:00,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284002871] [2022-03-15 15:59:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:00,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284002871] [2022-03-15 15:59:00,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284002871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:00,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017286821] [2022-03-15 15:59:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:00,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:00,444 INFO L229 MonitoredProcess]: Starting monitored process 652 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:00,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (652)] Waiting until timeout for monitored process [2022-03-15 15:59:00,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:59:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:59:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:00,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:00,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:00,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:00,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:00,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2022-03-15 15:59:00,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:00,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2022-03-15 15:59:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017286821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:01,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:01,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-03-15 15:59:01,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677306363] [2022-03-15 15:59:01,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:01,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:59:01,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:01,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:59:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:01,041 INFO L87 Difference]: Start difference. First operand 821 states and 2218 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:01,869 INFO L93 Difference]: Finished difference Result 881 states and 2340 transitions. [2022-03-15 15:59:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:59:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:01,870 INFO L225 Difference]: With dead ends: 881 [2022-03-15 15:59:01,870 INFO L226 Difference]: Without dead ends: 874 [2022-03-15 15:59:01,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:59:01,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:01,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 211 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 934 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2022-03-15 15:59:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-15 15:59:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 822. [2022-03-15 15:59:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.705237515225335) internal successors, (2221), 821 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2221 transitions. [2022-03-15 15:59:01,879 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2221 transitions. Word has length 20 [2022-03-15 15:59:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:01,879 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 2221 transitions. [2022-03-15 15:59:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2221 transitions. [2022-03-15 15:59:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:01,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:01,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:01,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (652)] Ended with exit code 0 [2022-03-15 15:59:02,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,652 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:02,083 INFO L402 AbstractCegarLoop]: === Iteration 658 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash -818210828, now seen corresponding path program 652 times [2022-03-15 15:59:02,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:02,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706143853] [2022-03-15 15:59:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:02,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706143853] [2022-03-15 15:59:02,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706143853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:02,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31654599] [2022-03-15 15:59:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:02,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:02,281 INFO L229 MonitoredProcess]: Starting monitored process 653 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:02,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (653)] Waiting until timeout for monitored process [2022-03-15 15:59:02,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:02,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:02,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:02,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:02,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:02,989 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:02,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:59:02,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:59:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:03,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31654599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:03,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:03,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:59:03,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091947296] [2022-03-15 15:59:03,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:03,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:59:03,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:03,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:59:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:03,067 INFO L87 Difference]: Start difference. First operand 822 states and 2221 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:05,216 INFO L93 Difference]: Finished difference Result 1071 states and 2638 transitions. [2022-03-15 15:59:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 15:59:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:05,218 INFO L225 Difference]: With dead ends: 1071 [2022-03-15 15:59:05,218 INFO L226 Difference]: Without dead ends: 1019 [2022-03-15 15:59:05,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=382, Invalid=3650, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:59:05,218 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:05,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 379 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1076 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-03-15 15:59:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-15 15:59:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 820. [2022-03-15 15:59:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 2.6971916971916974) internal successors, (2209), 819 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2209 transitions. [2022-03-15 15:59:05,227 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2209 transitions. Word has length 20 [2022-03-15 15:59:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:05,227 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 2209 transitions. [2022-03-15 15:59:05,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2209 transitions. [2022-03-15 15:59:05,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:05,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:05,228 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:05,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (653)] Ended with exit code 0 [2022-03-15 15:59:05,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 653 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2022-03-15 15:59:05,429 INFO L402 AbstractCegarLoop]: === Iteration 659 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1643648060, now seen corresponding path program 653 times [2022-03-15 15:59:05,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:05,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188609885] [2022-03-15 15:59:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:05,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:05,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:05,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188609885] [2022-03-15 15:59:05,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188609885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:05,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739516182] [2022-03-15 15:59:05,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:05,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:05,539 INFO L229 MonitoredProcess]: Starting monitored process 654 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:05,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (654)] Waiting until timeout for monitored process [2022-03-15 15:59:05,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:59:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:05,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:59:05,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:05,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:59:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:05,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:05,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:05,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 15:59:05,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:05,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 15:59:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:05,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739516182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:05,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:05,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-15 15:59:05,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194550924] [2022-03-15 15:59:05,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:05,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:05,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:05,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:05,823 INFO L87 Difference]: Start difference. First operand 820 states and 2209 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:06,159 INFO L93 Difference]: Finished difference Result 880 states and 2330 transitions. [2022-03-15 15:59:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:59:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:06,161 INFO L225 Difference]: With dead ends: 880 [2022-03-15 15:59:06,161 INFO L226 Difference]: Without dead ends: 880 [2022-03-15 15:59:06,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:06,161 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:06,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 151 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 669 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-15 15:59:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-03-15 15:59:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 813. [2022-03-15 15:59:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 2.6970443349753697) internal successors, (2190), 812 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2190 transitions. [2022-03-15 15:59:06,169 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2190 transitions. Word has length 20 [2022-03-15 15:59:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:06,169 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2190 transitions. [2022-03-15 15:59:06,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2190 transitions. [2022-03-15 15:59:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:06,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:06,170 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:06,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (654)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:06,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,654 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:06,386 INFO L402 AbstractCegarLoop]: === Iteration 660 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash 439820130, now seen corresponding path program 654 times [2022-03-15 15:59:06,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:06,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063789035] [2022-03-15 15:59:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:06,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:06,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063789035] [2022-03-15 15:59:06,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063789035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:06,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139967864] [2022-03-15 15:59:06,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:06,453 INFO L229 MonitoredProcess]: Starting monitored process 655 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:06,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Waiting until timeout for monitored process [2022-03-15 15:59:06,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:59:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:06,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:59:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:06,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:06,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 15:59:06,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:06,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-15 15:59:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:06,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:06,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:06,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 15:59:06,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:06,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 15:59:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:06,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139967864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:06,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:06,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-15 15:59:06,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762437076] [2022-03-15 15:59:06,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:06,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:59:06,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:59:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:59:06,661 INFO L87 Difference]: Start difference. First operand 813 states and 2190 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:07,110 INFO L93 Difference]: Finished difference Result 976 states and 2534 transitions. [2022-03-15 15:59:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:59:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:07,111 INFO L225 Difference]: With dead ends: 976 [2022-03-15 15:59:07,111 INFO L226 Difference]: Without dead ends: 974 [2022-03-15 15:59:07,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:59:07,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:07,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 122 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 635 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-15 15:59:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-03-15 15:59:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 811. [2022-03-15 15:59:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.6938271604938273) internal successors, (2182), 810 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2182 transitions. [2022-03-15 15:59:07,120 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2182 transitions. Word has length 20 [2022-03-15 15:59:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:07,120 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 2182 transitions. [2022-03-15 15:59:07,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2182 transitions. [2022-03-15 15:59:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:07,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:07,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:07,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:07,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,655 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:07,335 INFO L402 AbstractCegarLoop]: === Iteration 661 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:07,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1743392320, now seen corresponding path program 655 times [2022-03-15 15:59:07,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:07,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578409698] [2022-03-15 15:59:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:07,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578409698] [2022-03-15 15:59:07,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578409698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:07,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587040443] [2022-03-15 15:59:07,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:07,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:07,506 INFO L229 MonitoredProcess]: Starting monitored process 656 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:07,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (656)] Waiting until timeout for monitored process [2022-03-15 15:59:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:07,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:07,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:07,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:07,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:07,982 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:07,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 15:59:07,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 15:59:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587040443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:08,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:08,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-03-15 15:59:08,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948657574] [2022-03-15 15:59:08,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:08,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:59:08,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:59:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:08,065 INFO L87 Difference]: Start difference. First operand 811 states and 2182 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:08,764 INFO L93 Difference]: Finished difference Result 1048 states and 2645 transitions. [2022-03-15 15:59:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:59:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:08,766 INFO L225 Difference]: With dead ends: 1048 [2022-03-15 15:59:08,766 INFO L226 Difference]: Without dead ends: 1022 [2022-03-15 15:59:08,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:59:08,766 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:08,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 414 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1182 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-03-15 15:59:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-15 15:59:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 833. [2022-03-15 15:59:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.699519230769231) internal successors, (2246), 832 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2246 transitions. [2022-03-15 15:59:08,776 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2246 transitions. Word has length 20 [2022-03-15 15:59:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:08,776 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 2246 transitions. [2022-03-15 15:59:08,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2246 transitions. [2022-03-15 15:59:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:08,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:08,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:08,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (656)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:08,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,656 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:08,992 INFO L402 AbstractCegarLoop]: === Iteration 662 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 484174068, now seen corresponding path program 656 times [2022-03-15 15:59:08,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:08,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554832812] [2022-03-15 15:59:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:09,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554832812] [2022-03-15 15:59:09,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554832812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:09,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109641671] [2022-03-15 15:59:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:09,124 INFO L229 MonitoredProcess]: Starting monitored process 657 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:09,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (657)] Waiting until timeout for monitored process [2022-03-15 15:59:09,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:09,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:09,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:09,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:09,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:09,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:09,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:09,653 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:09,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2022-03-15 15:59:09,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-03-15 15:59:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109641671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:09,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:09,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-03-15 15:59:09,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487071020] [2022-03-15 15:59:09,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:09,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:59:09,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:59:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:09,738 INFO L87 Difference]: Start difference. First operand 833 states and 2246 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:11,123 INFO L93 Difference]: Finished difference Result 1137 states and 2781 transitions. [2022-03-15 15:59:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:59:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:11,125 INFO L225 Difference]: With dead ends: 1137 [2022-03-15 15:59:11,125 INFO L226 Difference]: Without dead ends: 1085 [2022-03-15 15:59:11,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=342, Invalid=2738, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:59:11,126 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 138 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:11,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 559 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1548 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-03-15 15:59:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-03-15 15:59:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 832. [2022-03-15 15:59:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.7015643802647413) internal successors, (2245), 831 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2245 transitions. [2022-03-15 15:59:11,136 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2245 transitions. Word has length 20 [2022-03-15 15:59:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:11,136 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 2245 transitions. [2022-03-15 15:59:11,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2245 transitions. [2022-03-15 15:59:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:11,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:11,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:11,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (657)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:11,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2022-03-15 15:59:11,347 INFO L402 AbstractCegarLoop]: === Iteration 663 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1661996692, now seen corresponding path program 657 times [2022-03-15 15:59:11,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:11,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921009619] [2022-03-15 15:59:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:11,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:11,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921009619] [2022-03-15 15:59:11,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921009619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:11,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388125136] [2022-03-15 15:59:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:11,534 INFO L229 MonitoredProcess]: Starting monitored process 658 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:11,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (658)] Waiting until timeout for monitored process [2022-03-15 15:59:11,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:59:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:59:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:11,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:11,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:11,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:12,145 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:12,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 15:59:12,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 15:59:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:12,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388125136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:12,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:12,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 15:59:12,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939994897] [2022-03-15 15:59:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:12,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:59:12,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:12,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:59:12,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:12,261 INFO L87 Difference]: Start difference. First operand 832 states and 2245 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:14,882 INFO L93 Difference]: Finished difference Result 1185 states and 2901 transitions. [2022-03-15 15:59:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:59:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:14,883 INFO L225 Difference]: With dead ends: 1185 [2022-03-15 15:59:14,883 INFO L226 Difference]: Without dead ends: 1122 [2022-03-15 15:59:14,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=409, Invalid=3623, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:59:14,884 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:14,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 515 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:59:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-03-15 15:59:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 821. [2022-03-15 15:59:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.6890243902439024) internal successors, (2205), 820 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2205 transitions. [2022-03-15 15:59:14,893 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2205 transitions. Word has length 20 [2022-03-15 15:59:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:14,893 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 2205 transitions. [2022-03-15 15:59:14,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2205 transitions. [2022-03-15 15:59:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:14,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:14,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:14,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (658)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:15,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2022-03-15 15:59:15,095 INFO L402 AbstractCegarLoop]: === Iteration 664 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash 526186484, now seen corresponding path program 658 times [2022-03-15 15:59:15,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:15,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140929028] [2022-03-15 15:59:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:15,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:15,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140929028] [2022-03-15 15:59:15,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140929028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:15,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280551339] [2022-03-15 15:59:15,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:15,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:15,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:15,350 INFO L229 MonitoredProcess]: Starting monitored process 659 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:15,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (659)] Waiting until timeout for monitored process [2022-03-15 15:59:15,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:15,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:15,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:15,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:15,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:15,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:15,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:16,072 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:16,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:59:16,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:59:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280551339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:16,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:16,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 15:59:16,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546948791] [2022-03-15 15:59:16,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:59:16,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:59:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:16,173 INFO L87 Difference]: Start difference. First operand 821 states and 2205 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:18,097 INFO L93 Difference]: Finished difference Result 1184 states and 2865 transitions. [2022-03-15 15:59:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:59:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:18,099 INFO L225 Difference]: With dead ends: 1184 [2022-03-15 15:59:18,099 INFO L226 Difference]: Without dead ends: 1142 [2022-03-15 15:59:18,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=335, Invalid=3087, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 15:59:18,099 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:18,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 549 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:59:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-15 15:59:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 826. [2022-03-15 15:59:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.6945454545454544) internal successors, (2223), 825 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2223 transitions. [2022-03-15 15:59:18,109 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2223 transitions. Word has length 20 [2022-03-15 15:59:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:18,109 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2223 transitions. [2022-03-15 15:59:18,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2223 transitions. [2022-03-15 15:59:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:18,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:18,116 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:18,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (659)] Ended with exit code 0 [2022-03-15 15:59:18,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2022-03-15 15:59:18,321 INFO L402 AbstractCegarLoop]: === Iteration 665 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1714002482, now seen corresponding path program 659 times [2022-03-15 15:59:18,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:18,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97743530] [2022-03-15 15:59:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:18,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97743530] [2022-03-15 15:59:18,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97743530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:18,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895912543] [2022-03-15 15:59:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:18,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:18,555 INFO L229 MonitoredProcess]: Starting monitored process 660 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:18,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (660)] Waiting until timeout for monitored process [2022-03-15 15:59:18,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:18,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:18,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:18,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:59:18,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:18,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:19,218 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:19,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:59:19,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:59:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895912543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:19,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:19,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 15:59:19,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646423317] [2022-03-15 15:59:19,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:19,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 15:59:19,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 15:59:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:19,286 INFO L87 Difference]: Start difference. First operand 826 states and 2223 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:19,946 INFO L93 Difference]: Finished difference Result 1091 states and 2733 transitions. [2022-03-15 15:59:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:59:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:19,947 INFO L225 Difference]: With dead ends: 1091 [2022-03-15 15:59:19,947 INFO L226 Difference]: Without dead ends: 1070 [2022-03-15 15:59:19,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:59:19,947 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:19,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 574 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1117 Invalid, 0 Unknown, 133 Unchecked, 0.4s Time] [2022-03-15 15:59:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-15 15:59:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 862. [2022-03-15 15:59:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.6957026713124272) internal successors, (2321), 861 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2321 transitions. [2022-03-15 15:59:19,957 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2321 transitions. Word has length 20 [2022-03-15 15:59:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:19,957 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2321 transitions. [2022-03-15 15:59:19,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2321 transitions. [2022-03-15 15:59:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:19,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:19,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:19,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (660)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:20,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2022-03-15 15:59:20,174 INFO L402 AbstractCegarLoop]: === Iteration 666 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:20,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash -105687300, now seen corresponding path program 660 times [2022-03-15 15:59:20,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:20,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180020160] [2022-03-15 15:59:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:20,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180020160] [2022-03-15 15:59:20,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180020160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:20,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796895052] [2022-03-15 15:59:20,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:20,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:20,402 INFO L229 MonitoredProcess]: Starting monitored process 661 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:20,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (661)] Waiting until timeout for monitored process [2022-03-15 15:59:20,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:59:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:20,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:20,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:20,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:20,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:21,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:21,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:59:21,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:21,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:59:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796895052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:21,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:21,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 15:59:21,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952582839] [2022-03-15 15:59:21,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:21,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:59:21,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:59:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:21,310 INFO L87 Difference]: Start difference. First operand 862 states and 2321 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:21,575 INFO L93 Difference]: Finished difference Result 893 states and 2379 transitions. [2022-03-15 15:59:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:21,576 INFO L225 Difference]: With dead ends: 893 [2022-03-15 15:59:21,576 INFO L226 Difference]: Without dead ends: 890 [2022-03-15 15:59:21,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:21,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:21,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 216 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 571 Invalid, 0 Unknown, 231 Unchecked, 0.2s Time] [2022-03-15 15:59:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-15 15:59:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 862. [2022-03-15 15:59:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.6957026713124272) internal successors, (2321), 861 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2321 transitions. [2022-03-15 15:59:21,585 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2321 transitions. Word has length 20 [2022-03-15 15:59:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:21,585 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2321 transitions. [2022-03-15 15:59:21,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2321 transitions. [2022-03-15 15:59:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:21,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:21,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:21,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (661)] Ended with exit code 0 [2022-03-15 15:59:21,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,661 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:21,799 INFO L402 AbstractCegarLoop]: === Iteration 667 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1023637490, now seen corresponding path program 661 times [2022-03-15 15:59:21,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:21,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549543311] [2022-03-15 15:59:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:22,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549543311] [2022-03-15 15:59:22,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549543311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:22,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162153740] [2022-03-15 15:59:22,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:22,014 INFO L229 MonitoredProcess]: Starting monitored process 662 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:22,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (662)] Waiting until timeout for monitored process [2022-03-15 15:59:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:22,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:59:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:22,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:59:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:22,641 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:22,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:59:22,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:59:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162153740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:22,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:22,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 15:59:22,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610050276] [2022-03-15 15:59:22,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:22,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 15:59:22,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 15:59:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:22,708 INFO L87 Difference]: Start difference. First operand 862 states and 2321 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:23,238 INFO L93 Difference]: Finished difference Result 1089 states and 2721 transitions. [2022-03-15 15:59:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:59:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:23,240 INFO L225 Difference]: With dead ends: 1089 [2022-03-15 15:59:23,240 INFO L226 Difference]: Without dead ends: 1068 [2022-03-15 15:59:23,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:59:23,240 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:23,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 568 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1094 Invalid, 0 Unknown, 260 Unchecked, 0.3s Time] [2022-03-15 15:59:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-03-15 15:59:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 872. [2022-03-15 15:59:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.6946039035591274) internal successors, (2347), 871 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2347 transitions. [2022-03-15 15:59:23,249 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2347 transitions. Word has length 20 [2022-03-15 15:59:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:23,249 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2347 transitions. [2022-03-15 15:59:23,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2347 transitions. [2022-03-15 15:59:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:23,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:23,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:23,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (662)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:23,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,662 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:23,466 INFO L402 AbstractCegarLoop]: === Iteration 668 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1823428070, now seen corresponding path program 662 times [2022-03-15 15:59:23,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:23,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273348015] [2022-03-15 15:59:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:23,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:23,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273348015] [2022-03-15 15:59:23,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273348015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:23,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196454282] [2022-03-15 15:59:23,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:23,596 INFO L229 MonitoredProcess]: Starting monitored process 663 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:23,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (663)] Waiting until timeout for monitored process [2022-03-15 15:59:23,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:23,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:23,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:23,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:23,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:23,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:23,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:24,261 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:24,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:59:24,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:59:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196454282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:24,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:24,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 15:59:24,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116083631] [2022-03-15 15:59:24,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:24,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 15:59:24,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 15:59:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:24,340 INFO L87 Difference]: Start difference. First operand 872 states and 2347 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:24,965 INFO L93 Difference]: Finished difference Result 1164 states and 2849 transitions. [2022-03-15 15:59:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:59:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:24,967 INFO L225 Difference]: With dead ends: 1164 [2022-03-15 15:59:24,967 INFO L226 Difference]: Without dead ends: 1144 [2022-03-15 15:59:24,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1724, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:59:24,968 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 106 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:24,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 512 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1138 Invalid, 0 Unknown, 243 Unchecked, 0.4s Time] [2022-03-15 15:59:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-03-15 15:59:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 889. [2022-03-15 15:59:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.688063063063063) internal successors, (2387), 888 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2387 transitions. [2022-03-15 15:59:24,977 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2387 transitions. Word has length 20 [2022-03-15 15:59:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:24,977 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2387 transitions. [2022-03-15 15:59:24,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2387 transitions. [2022-03-15 15:59:24,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:24,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:24,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:24,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (663)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:25,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 663 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2022-03-15 15:59:25,194 INFO L402 AbstractCegarLoop]: === Iteration 669 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash -138590246, now seen corresponding path program 663 times [2022-03-15 15:59:25,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:25,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299144826] [2022-03-15 15:59:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:25,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:25,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:25,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299144826] [2022-03-15 15:59:25,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299144826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:25,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346898958] [2022-03-15 15:59:25,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:25,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:25,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:25,324 INFO L229 MonitoredProcess]: Starting monitored process 664 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:25,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (664)] Waiting until timeout for monitored process [2022-03-15 15:59:25,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:59:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:25,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:25,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:25,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:25,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:59:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:25,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:26,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:26,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 15:59:26,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:26,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 15:59:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346898958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:26,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:26,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 15:59:26,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549634782] [2022-03-15 15:59:26,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:26,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:59:26,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:59:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:26,156 INFO L87 Difference]: Start difference. First operand 889 states and 2387 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:26,521 INFO L93 Difference]: Finished difference Result 918 states and 2442 transitions. [2022-03-15 15:59:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:26,523 INFO L225 Difference]: With dead ends: 918 [2022-03-15 15:59:26,523 INFO L226 Difference]: Without dead ends: 915 [2022-03-15 15:59:26,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:59:26,523 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:26,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 191 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 612 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-03-15 15:59:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-03-15 15:59:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 889. [2022-03-15 15:59:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.688063063063063) internal successors, (2387), 888 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2387 transitions. [2022-03-15 15:59:26,531 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2387 transitions. Word has length 20 [2022-03-15 15:59:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:26,531 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2387 transitions. [2022-03-15 15:59:26,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2387 transitions. [2022-03-15 15:59:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:26,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:26,532 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:26,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (664)] Ended with exit code 0 [2022-03-15 15:59:26,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2022-03-15 15:59:26,747 INFO L402 AbstractCegarLoop]: === Iteration 670 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash -25842610, now seen corresponding path program 664 times [2022-03-15 15:59:26,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:26,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34795883] [2022-03-15 15:59:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:26,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34795883] [2022-03-15 15:59:26,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34795883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:26,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753193889] [2022-03-15 15:59:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:26,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:26,957 INFO L229 MonitoredProcess]: Starting monitored process 665 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:26,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (665)] Waiting until timeout for monitored process [2022-03-15 15:59:26,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:27,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:27,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:27,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:27,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:59:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:27,803 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:27,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:27,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753193889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:27,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:27,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 15:59:27,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112513790] [2022-03-15 15:59:27,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:27,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 15:59:27,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:27,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 15:59:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:27,887 INFO L87 Difference]: Start difference. First operand 889 states and 2387 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:28,770 INFO L93 Difference]: Finished difference Result 1141 states and 2810 transitions. [2022-03-15 15:59:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:59:28,771 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:28,772 INFO L225 Difference]: With dead ends: 1141 [2022-03-15 15:59:28,772 INFO L226 Difference]: Without dead ends: 1118 [2022-03-15 15:59:28,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=1651, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:59:28,773 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 81 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:28,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 764 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1496 Invalid, 0 Unknown, 210 Unchecked, 0.5s Time] [2022-03-15 15:59:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-15 15:59:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 893. [2022-03-15 15:59:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.6894618834080717) internal successors, (2399), 892 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2399 transitions. [2022-03-15 15:59:28,782 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2399 transitions. Word has length 20 [2022-03-15 15:59:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:28,782 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2399 transitions. [2022-03-15 15:59:28,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2399 transitions. [2022-03-15 15:59:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:28,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:28,783 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:28,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (665)] Ended with exit code 0 [2022-03-15 15:59:28,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,665 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:28,999 INFO L402 AbstractCegarLoop]: === Iteration 671 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 309238682, now seen corresponding path program 665 times [2022-03-15 15:59:28,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:28,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406120091] [2022-03-15 15:59:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:28,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:29,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406120091] [2022-03-15 15:59:29,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406120091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:29,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008454120] [2022-03-15 15:59:29,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:29,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:29,194 INFO L229 MonitoredProcess]: Starting monitored process 666 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:29,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (666)] Waiting until timeout for monitored process [2022-03-15 15:59:29,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:29,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:29,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:29,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:29,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:29,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:29,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:29,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:30,164 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:30,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:30,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:30,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008454120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:30,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:30,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 15:59:30,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136102922] [2022-03-15 15:59:30,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:30,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 15:59:30,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 15:59:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:30,237 INFO L87 Difference]: Start difference. First operand 893 states and 2399 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:31,100 INFO L93 Difference]: Finished difference Result 1122 states and 2777 transitions. [2022-03-15 15:59:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:59:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:31,102 INFO L225 Difference]: With dead ends: 1122 [2022-03-15 15:59:31,102 INFO L226 Difference]: Without dead ends: 1102 [2022-03-15 15:59:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:59:31,102 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:31,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 684 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1394 Invalid, 0 Unknown, 372 Unchecked, 0.5s Time] [2022-03-15 15:59:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-03-15 15:59:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 885. [2022-03-15 15:59:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.682126696832579) internal successors, (2371), 884 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2371 transitions. [2022-03-15 15:59:31,111 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2371 transitions. Word has length 20 [2022-03-15 15:59:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:31,111 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2371 transitions. [2022-03-15 15:59:31,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2371 transitions. [2022-03-15 15:59:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:31,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:31,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:31,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (666)] Ended with exit code 0 [2022-03-15 15:59:31,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,666 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:31,327 INFO L402 AbstractCegarLoop]: === Iteration 672 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1758162226, now seen corresponding path program 666 times [2022-03-15 15:59:31,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:31,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173801481] [2022-03-15 15:59:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:31,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173801481] [2022-03-15 15:59:31,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173801481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:31,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806482429] [2022-03-15 15:59:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:31,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:31,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:31,580 INFO L229 MonitoredProcess]: Starting monitored process 667 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:31,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (667)] Waiting until timeout for monitored process [2022-03-15 15:59:31,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:59:31,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:31,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:31,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:31,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:31,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:32,542 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:32,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 15:59:32,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 15:59:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:32,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806482429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:32,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:32,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 15:59:32,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138173056] [2022-03-15 15:59:32,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:32,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 15:59:32,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 15:59:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:32,644 INFO L87 Difference]: Start difference. First operand 885 states and 2371 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:35,565 INFO L93 Difference]: Finished difference Result 1253 states and 2969 transitions. [2022-03-15 15:59:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 15:59:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:35,567 INFO L225 Difference]: With dead ends: 1253 [2022-03-15 15:59:35,567 INFO L226 Difference]: Without dead ends: 1199 [2022-03-15 15:59:35,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=327, Invalid=2979, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:59:35,567 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:35,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 525 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1355 Invalid, 0 Unknown, 175 Unchecked, 0.6s Time] [2022-03-15 15:59:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-03-15 15:59:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 880. [2022-03-15 15:59:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 2.678043230944255) internal successors, (2354), 879 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2354 transitions. [2022-03-15 15:59:35,577 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2354 transitions. Word has length 20 [2022-03-15 15:59:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:35,577 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2354 transitions. [2022-03-15 15:59:35,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2354 transitions. [2022-03-15 15:59:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:35,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:35,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:35,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (667)] Ended with exit code 0 [2022-03-15 15:59:35,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 667 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable671 [2022-03-15 15:59:35,780 INFO L402 AbstractCegarLoop]: === Iteration 673 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:35,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1911456000, now seen corresponding path program 667 times [2022-03-15 15:59:35,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:35,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381142172] [2022-03-15 15:59:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:36,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381142172] [2022-03-15 15:59:36,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381142172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:36,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797780477] [2022-03-15 15:59:36,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:36,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:36,026 INFO L229 MonitoredProcess]: Starting monitored process 668 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:36,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (668)] Waiting until timeout for monitored process [2022-03-15 15:59:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:36,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:36,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:36,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:36,940 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:36,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:59:36,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:59:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:37,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797780477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:37,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:37,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 15:59:37,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455136561] [2022-03-15 15:59:37,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:37,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 15:59:37,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 15:59:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:37,050 INFO L87 Difference]: Start difference. First operand 880 states and 2354 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:38,857 INFO L93 Difference]: Finished difference Result 1074 states and 2683 transitions. [2022-03-15 15:59:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:59:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:38,859 INFO L225 Difference]: With dead ends: 1074 [2022-03-15 15:59:38,859 INFO L226 Difference]: Without dead ends: 1034 [2022-03-15 15:59:38,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:59:38,860 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:38,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 442 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1147 Invalid, 0 Unknown, 254 Unchecked, 0.4s Time] [2022-03-15 15:59:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-03-15 15:59:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 890. [2022-03-15 15:59:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.687289088863892) internal successors, (2389), 889 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2389 transitions. [2022-03-15 15:59:38,869 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2389 transitions. Word has length 20 [2022-03-15 15:59:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:38,869 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2389 transitions. [2022-03-15 15:59:38,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2389 transitions. [2022-03-15 15:59:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:38,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:38,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:38,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (668)] Ended with exit code 0 [2022-03-15 15:59:39,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 668 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2022-03-15 15:59:39,075 INFO L402 AbstractCegarLoop]: === Iteration 674 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash -604519006, now seen corresponding path program 668 times [2022-03-15 15:59:39,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:39,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264538866] [2022-03-15 15:59:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:39,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264538866] [2022-03-15 15:59:39,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264538866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:39,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940885917] [2022-03-15 15:59:39,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:39,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:39,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:39,307 INFO L229 MonitoredProcess]: Starting monitored process 669 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:39,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (669)] Waiting until timeout for monitored process [2022-03-15 15:59:39,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:39,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:39,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:39,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:39,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:39,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:59:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:40,086 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:40,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:40,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940885917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:40,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:40,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 15:59:40,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320972865] [2022-03-15 15:59:40,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:40,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 15:59:40,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 15:59:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:40,169 INFO L87 Difference]: Start difference. First operand 890 states and 2389 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:40,850 INFO L93 Difference]: Finished difference Result 1161 states and 2931 transitions. [2022-03-15 15:59:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:59:40,850 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:40,852 INFO L225 Difference]: With dead ends: 1161 [2022-03-15 15:59:40,852 INFO L226 Difference]: Without dead ends: 1131 [2022-03-15 15:59:40,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:59:40,852 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:40,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 476 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1116 Invalid, 0 Unknown, 168 Unchecked, 0.3s Time] [2022-03-15 15:59:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-03-15 15:59:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 912. [2022-03-15 15:59:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.693743139407245) internal successors, (2454), 911 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2454 transitions. [2022-03-15 15:59:40,861 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2454 transitions. Word has length 20 [2022-03-15 15:59:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:40,861 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2454 transitions. [2022-03-15 15:59:40,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2454 transitions. [2022-03-15 15:59:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:40,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:40,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:40,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (669)] Ended with exit code 0 [2022-03-15 15:59:41,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2022-03-15 15:59:41,067 INFO L402 AbstractCegarLoop]: === Iteration 675 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1522469196, now seen corresponding path program 669 times [2022-03-15 15:59:41,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:41,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072260569] [2022-03-15 15:59:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:41,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:41,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072260569] [2022-03-15 15:59:41,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072260569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:41,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413296616] [2022-03-15 15:59:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:41,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:41,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:41,243 INFO L229 MonitoredProcess]: Starting monitored process 670 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:41,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (670)] Waiting until timeout for monitored process [2022-03-15 15:59:41,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:41,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:41,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 15:59:41,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:41,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-03-15 15:59:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:41,815 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:41,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:41,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413296616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:41,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:41,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 15:59:41,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553143185] [2022-03-15 15:59:41,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:41,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 15:59:41,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 15:59:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:41,894 INFO L87 Difference]: Start difference. First operand 912 states and 2454 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:42,692 INFO L93 Difference]: Finished difference Result 1116 states and 2826 transitions. [2022-03-15 15:59:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:59:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:42,694 INFO L225 Difference]: With dead ends: 1116 [2022-03-15 15:59:42,694 INFO L226 Difference]: Without dead ends: 1096 [2022-03-15 15:59:42,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:59:42,694 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 72 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:42,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 615 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1379 Invalid, 0 Unknown, 287 Unchecked, 0.4s Time] [2022-03-15 15:59:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-03-15 15:59:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 906. [2022-03-15 15:59:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.693922651933702) internal successors, (2438), 905 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2438 transitions. [2022-03-15 15:59:42,704 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2438 transitions. Word has length 20 [2022-03-15 15:59:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:42,704 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2438 transitions. [2022-03-15 15:59:42,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2438 transitions. [2022-03-15 15:59:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:42,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:42,705 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:42,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (670)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2022-03-15 15:59:42,919 INFO L402 AbstractCegarLoop]: === Iteration 676 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1193066454, now seen corresponding path program 670 times [2022-03-15 15:59:42,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:42,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436926365] [2022-03-15 15:59:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:43,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:43,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436926365] [2022-03-15 15:59:43,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436926365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:43,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858536358] [2022-03-15 15:59:43,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:43,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:43,069 INFO L229 MonitoredProcess]: Starting monitored process 671 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:43,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (671)] Waiting until timeout for monitored process [2022-03-15 15:59:43,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:43,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:43,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:43,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 15:59:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:43,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:43,680 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:43,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:43,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:43,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858536358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:43,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:43,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 15:59:43,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579966866] [2022-03-15 15:59:43,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 15:59:43,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 15:59:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:43,758 INFO L87 Difference]: Start difference. First operand 906 states and 2438 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:44,506 INFO L93 Difference]: Finished difference Result 1153 states and 2875 transitions. [2022-03-15 15:59:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:59:44,507 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:44,508 INFO L225 Difference]: With dead ends: 1153 [2022-03-15 15:59:44,508 INFO L226 Difference]: Without dead ends: 1121 [2022-03-15 15:59:44,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:59:44,509 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 95 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:44,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 605 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1443 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-03-15 15:59:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-03-15 15:59:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 910. [2022-03-15 15:59:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.694169416941694) internal successors, (2449), 909 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2449 transitions. [2022-03-15 15:59:44,518 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2449 transitions. Word has length 20 [2022-03-15 15:59:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:44,518 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2449 transitions. [2022-03-15 15:59:44,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2449 transitions. [2022-03-15 15:59:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:44,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:44,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:44,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (671)] Ended with exit code 0 [2022-03-15 15:59:44,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 671 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2022-03-15 15:59:44,723 INFO L402 AbstractCegarLoop]: === Iteration 677 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:44,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1528147746, now seen corresponding path program 671 times [2022-03-15 15:59:44,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:44,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317068056] [2022-03-15 15:59:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:44,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:44,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317068056] [2022-03-15 15:59:44,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317068056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:44,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629022886] [2022-03-15 15:59:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:44,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:44,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:44,965 INFO L229 MonitoredProcess]: Starting monitored process 672 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:44,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (672)] Waiting until timeout for monitored process [2022-03-15 15:59:44,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:44,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:45,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:45,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:45,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:45,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:45,898 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:45,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:59:45,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:59:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:46,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629022886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:46,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:46,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 15:59:46,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704004602] [2022-03-15 15:59:46,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:46,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 15:59:46,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 15:59:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:46,020 INFO L87 Difference]: Start difference. First operand 910 states and 2449 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:46,914 INFO L93 Difference]: Finished difference Result 1162 states and 2910 transitions. [2022-03-15 15:59:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:59:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:46,916 INFO L225 Difference]: With dead ends: 1162 [2022-03-15 15:59:46,916 INFO L226 Difference]: Without dead ends: 1135 [2022-03-15 15:59:46,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:59:46,916 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 89 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:46,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 566 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1417 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-03-15 15:59:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-03-15 15:59:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 911. [2022-03-15 15:59:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.6934065934065936) internal successors, (2451), 910 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2451 transitions. [2022-03-15 15:59:46,925 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2451 transitions. Word has length 20 [2022-03-15 15:59:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:46,925 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2451 transitions. [2022-03-15 15:59:46,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2451 transitions. [2022-03-15 15:59:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:46,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:46,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:46,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (672)] Ended with exit code 0 [2022-03-15 15:59:47,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2022-03-15 15:59:47,135 INFO L402 AbstractCegarLoop]: === Iteration 678 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash -539253162, now seen corresponding path program 672 times [2022-03-15 15:59:47,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:47,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294103482] [2022-03-15 15:59:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:47,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294103482] [2022-03-15 15:59:47,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294103482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169293796] [2022-03-15 15:59:47,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:47,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:47,406 INFO L229 MonitoredProcess]: Starting monitored process 673 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (673)] Waiting until timeout for monitored process [2022-03-15 15:59:47,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:59:47,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 15:59:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:47,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:47,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:47,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:48,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:48,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 76 [2022-03-15 15:59:48,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:48,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 52 [2022-03-15 15:59:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:48,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169293796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:48,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:48,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 15:59:48,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093664891] [2022-03-15 15:59:48,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:48,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:59:48,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:59:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:48,395 INFO L87 Difference]: Start difference. First operand 911 states and 2451 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:49,168 INFO L93 Difference]: Finished difference Result 948 states and 2524 transitions. [2022-03-15 15:59:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:59:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:49,169 INFO L225 Difference]: With dead ends: 948 [2022-03-15 15:59:49,169 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 15:59:49,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:59:49,169 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 611 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-03-15 15:59:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 15:59:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 913. [2022-03-15 15:59:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.6940789473684212) internal successors, (2457), 912 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2457 transitions. [2022-03-15 15:59:49,178 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2457 transitions. Word has length 20 [2022-03-15 15:59:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:49,178 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 2457 transitions. [2022-03-15 15:59:49,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2457 transitions. [2022-03-15 15:59:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:49,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:49,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:49,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (673)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:49,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2022-03-15 15:59:49,394 INFO L402 AbstractCegarLoop]: === Iteration 679 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash 111597688, now seen corresponding path program 673 times [2022-03-15 15:59:49,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:49,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451320873] [2022-03-15 15:59:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:49,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:49,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451320873] [2022-03-15 15:59:49,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451320873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:49,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192677222] [2022-03-15 15:59:49,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:49,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:49,583 INFO L229 MonitoredProcess]: Starting monitored process 674 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:49,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (674)] Waiting until timeout for monitored process [2022-03-15 15:59:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:49,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:49,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:49,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:49,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:49,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:50,255 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:50,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 15:59:50,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 15:59:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:50,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192677222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:50,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:50,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 15:59:50,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128460906] [2022-03-15 15:59:50,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:50,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:59:50,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:59:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:50,380 INFO L87 Difference]: Start difference. First operand 913 states and 2457 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:52,252 INFO L93 Difference]: Finished difference Result 1094 states and 2755 transitions. [2022-03-15 15:59:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:59:52,252 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:52,253 INFO L225 Difference]: With dead ends: 1094 [2022-03-15 15:59:52,253 INFO L226 Difference]: Without dead ends: 1045 [2022-03-15 15:59:52,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=379, Invalid=3403, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:59:52,254 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 142 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:52,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 370 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1101 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2022-03-15 15:59:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-03-15 15:59:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 922. [2022-03-15 15:59:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.6948968512486426) internal successors, (2482), 921 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2482 transitions. [2022-03-15 15:59:52,263 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2482 transitions. Word has length 20 [2022-03-15 15:59:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:52,263 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2482 transitions. [2022-03-15 15:59:52,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2482 transitions. [2022-03-15 15:59:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:52,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:52,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:52,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (674)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:52,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2022-03-15 15:59:52,479 INFO L402 AbstractCegarLoop]: === Iteration 680 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2063670094, now seen corresponding path program 674 times [2022-03-15 15:59:52,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:52,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798441461] [2022-03-15 15:59:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:52,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:52,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798441461] [2022-03-15 15:59:52,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798441461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:52,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528724588] [2022-03-15 15:59:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:52,614 INFO L229 MonitoredProcess]: Starting monitored process 675 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:52,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (675)] Waiting until timeout for monitored process [2022-03-15 15:59:52,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:52,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:52,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:52,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:52,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:52,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:53,204 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:53,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:53,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528724588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:53,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:53,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 15:59:53,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812464953] [2022-03-15 15:59:53,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:53,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:59:53,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:59:53,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:53,310 INFO L87 Difference]: Start difference. First operand 922 states and 2482 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:54,092 INFO L93 Difference]: Finished difference Result 1140 states and 2908 transitions. [2022-03-15 15:59:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:59:54,092 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:54,094 INFO L225 Difference]: With dead ends: 1140 [2022-03-15 15:59:54,094 INFO L226 Difference]: Without dead ends: 1118 [2022-03-15 15:59:54,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:59:54,094 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:54,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 425 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1058 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-03-15 15:59:54,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-15 15:59:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 942. [2022-03-15 15:59:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.6992561105207225) internal successors, (2540), 941 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2540 transitions. [2022-03-15 15:59:54,105 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2540 transitions. Word has length 20 [2022-03-15 15:59:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:54,105 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 2540 transitions. [2022-03-15 15:59:54,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2540 transitions. [2022-03-15 15:59:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:54,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:54,106 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:54,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (675)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:54,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,675 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:54,322 INFO L402 AbstractCegarLoop]: === Iteration 681 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash 371490812, now seen corresponding path program 675 times [2022-03-15 15:59:54,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:54,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534165646] [2022-03-15 15:59:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:54,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:54,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534165646] [2022-03-15 15:59:54,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534165646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:54,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084373395] [2022-03-15 15:59:54,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:54,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:54,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:54,517 INFO L229 MonitoredProcess]: Starting monitored process 676 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:54,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (676)] Waiting until timeout for monitored process [2022-03-15 15:59:54,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:54,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:54,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:54,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:54,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:54,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:54,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:55,159 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:55,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 15:59:55,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 15:59:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:55,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084373395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:55,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:55,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 15:59:55,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354918989] [2022-03-15 15:59:55,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:55,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:59:55,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:59:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:55,246 INFO L87 Difference]: Start difference. First operand 942 states and 2540 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:55,831 INFO L93 Difference]: Finished difference Result 1105 states and 2824 transitions. [2022-03-15 15:59:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:59:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:55,833 INFO L225 Difference]: With dead ends: 1105 [2022-03-15 15:59:55,833 INFO L226 Difference]: Without dead ends: 1087 [2022-03-15 15:59:55,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:59:55,833 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:55,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 479 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1044 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-03-15 15:59:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-03-15 15:59:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 936. [2022-03-15 15:59:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.6983957219251336) internal successors, (2523), 935 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2523 transitions. [2022-03-15 15:59:55,843 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2523 transitions. Word has length 20 [2022-03-15 15:59:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:55,843 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 2523 transitions. [2022-03-15 15:59:55,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2523 transitions. [2022-03-15 15:59:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:55,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:55,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:55,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (676)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:56,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,676 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:56,059 INFO L402 AbstractCegarLoop]: === Iteration 682 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1896215910, now seen corresponding path program 676 times [2022-03-15 15:59:56,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:56,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625731971] [2022-03-15 15:59:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:56,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:56,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625731971] [2022-03-15 15:59:56,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625731971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:56,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739115952] [2022-03-15 15:59:56,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:56,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:56,203 INFO L229 MonitoredProcess]: Starting monitored process 677 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:56,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (677)] Waiting until timeout for monitored process [2022-03-15 15:59:56,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:56,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:56,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:56,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 15:59:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:56,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:56,887 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:56,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 15:59:56,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 15:59:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:56,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739115952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:56,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:56,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 15:59:56,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772279401] [2022-03-15 15:59:56,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:56,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:59:56,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:59:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:56,972 INFO L87 Difference]: Start difference. First operand 936 states and 2523 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:57,616 INFO L93 Difference]: Finished difference Result 1129 states and 2870 transitions. [2022-03-15 15:59:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:59:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:57,618 INFO L225 Difference]: With dead ends: 1129 [2022-03-15 15:59:57,618 INFO L226 Difference]: Without dead ends: 1103 [2022-03-15 15:59:57,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:59:57,619 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:57,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 389 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1009 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-03-15 15:59:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-03-15 15:59:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 942. [2022-03-15 15:59:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.6971307120085015) internal successors, (2538), 941 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2538 transitions. [2022-03-15 15:59:57,628 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2538 transitions. Word has length 20 [2022-03-15 15:59:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:57,628 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 2538 transitions. [2022-03-15 15:59:57,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2538 transitions. [2022-03-15 15:59:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:57,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:57,629 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:57,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (677)] Ended with exit code 0 [2022-03-15 15:59:57,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,677 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:57,843 INFO L402 AbstractCegarLoop]: === Iteration 683 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash 331350478, now seen corresponding path program 677 times [2022-03-15 15:59:57,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:57,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414495419] [2022-03-15 15:59:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:57,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:57,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:57,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414495419] [2022-03-15 15:59:57,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414495419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:57,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365800982] [2022-03-15 15:59:57,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:57,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:57,984 INFO L229 MonitoredProcess]: Starting monitored process 678 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:57,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (678)] Waiting until timeout for monitored process [2022-03-15 15:59:58,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:59:58,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:59:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:58,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:58,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 15:59:58,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:58,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 15:59:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:58,637 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 15:59:58,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 15:59:58,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 15:59:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365800982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:58,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:58,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-03-15 15:59:58,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975774942] [2022-03-15 15:59:58,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:59:58,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:59:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:58,721 INFO L87 Difference]: Start difference. First operand 942 states and 2538 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:59,458 INFO L93 Difference]: Finished difference Result 1161 states and 2941 transitions. [2022-03-15 15:59:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:59:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:59:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:59,460 INFO L225 Difference]: With dead ends: 1161 [2022-03-15 15:59:59,460 INFO L226 Difference]: Without dead ends: 1133 [2022-03-15 15:59:59,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:59:59,460 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:59,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 521 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1247 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2022-03-15 15:59:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-15 15:59:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 942. [2022-03-15 15:59:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7003188097768334) internal successors, (2541), 941 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2541 transitions. [2022-03-15 15:59:59,470 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2541 transitions. Word has length 20 [2022-03-15 15:59:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:59,470 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 2541 transitions. [2022-03-15 15:59:59,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2541 transitions. [2022-03-15 15:59:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:59:59,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:59,471 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:59,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (678)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:59,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,678 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:59,679 INFO L402 AbstractCegarLoop]: === Iteration 684 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1159416914, now seen corresponding path program 678 times [2022-03-15 15:59:59,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:59,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496737849] [2022-03-15 15:59:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:59,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:59,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496737849] [2022-03-15 15:59:59,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496737849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:59,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143940841] [2022-03-15 15:59:59,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:59,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:59,779 INFO L229 MonitoredProcess]: Starting monitored process 679 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (679)] Waiting until timeout for monitored process [2022-03-15 15:59:59,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:59:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:59:59,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:59,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 15:59:59,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:59,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 15:59:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:59:59,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:00,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:00,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 16:00:00,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:00,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 16:00:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:00,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143940841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:00,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:00,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:00:00,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135912426] [2022-03-15 16:00:00,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:00,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:00,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:00,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:00,086 INFO L87 Difference]: Start difference. First operand 942 states and 2541 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:00,352 INFO L93 Difference]: Finished difference Result 1070 states and 2799 transitions. [2022-03-15 16:00:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:00:00,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:00,354 INFO L225 Difference]: With dead ends: 1070 [2022-03-15 16:00:00,354 INFO L226 Difference]: Without dead ends: 1070 [2022-03-15 16:00:00,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:00,354 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:00,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 109 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 449 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-03-15 16:00:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-15 16:00:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 937. [2022-03-15 16:00:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.699786324786325) internal successors, (2527), 936 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2527 transitions. [2022-03-15 16:00:00,363 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2527 transitions. Word has length 20 [2022-03-15 16:00:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:00,363 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 2527 transitions. [2022-03-15 16:00:00,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2527 transitions. [2022-03-15 16:00:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:00,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:00,364 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:00,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (679)] Ended with exit code 0 [2022-03-15 16:00:00,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,679 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:00,580 INFO L402 AbstractCegarLoop]: === Iteration 685 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash -238784512, now seen corresponding path program 679 times [2022-03-15 16:00:00,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:00,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156858596] [2022-03-15 16:00:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:00,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:00,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156858596] [2022-03-15 16:00:00,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156858596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:00,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303710156] [2022-03-15 16:00:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:00,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:00,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:00,770 INFO L229 MonitoredProcess]: Starting monitored process 680 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:00,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (680)] Waiting until timeout for monitored process [2022-03-15 16:00:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:00,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:00,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:00,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:01,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:01,481 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:01,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 16:00:01,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 16:00:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:00:01,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303710156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:01,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:01,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 31 [2022-03-15 16:00:01,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165712294] [2022-03-15 16:00:01,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:01,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:00:01,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:00:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:01,584 INFO L87 Difference]: Start difference. First operand 937 states and 2527 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:03,244 INFO L93 Difference]: Finished difference Result 1109 states and 2812 transitions. [2022-03-15 16:00:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:00:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:03,246 INFO L225 Difference]: With dead ends: 1109 [2022-03-15 16:00:03,246 INFO L226 Difference]: Without dead ends: 1067 [2022-03-15 16:00:03,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=336, Invalid=2634, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:00:03,247 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:03,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 356 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1094 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-03-15 16:00:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-03-15 16:00:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 929. [2022-03-15 16:00:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.7047413793103448) internal successors, (2510), 928 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2510 transitions. [2022-03-15 16:00:03,256 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2510 transitions. Word has length 20 [2022-03-15 16:00:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:03,256 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 2510 transitions. [2022-03-15 16:00:03,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2510 transitions. [2022-03-15 16:00:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:03,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:03,257 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:03,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (680)] Ended with exit code 0 [2022-03-15 16:00:03,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,680 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:03,471 INFO L402 AbstractCegarLoop]: === Iteration 686 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1910012024, now seen corresponding path program 680 times [2022-03-15 16:00:03,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:03,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103339696] [2022-03-15 16:00:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:03,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:03,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103339696] [2022-03-15 16:00:03,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103339696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:03,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960281816] [2022-03-15 16:00:03,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:03,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:03,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:03,689 INFO L229 MonitoredProcess]: Starting monitored process 681 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:03,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (681)] Waiting until timeout for monitored process [2022-03-15 16:00:03,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:03,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:03,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:03,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:03,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:03,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:04,304 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:04,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 93 [2022-03-15 16:00:04,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 70 [2022-03-15 16:00:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:00:04,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960281816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:04,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:04,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 31 [2022-03-15 16:00:04,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251062238] [2022-03-15 16:00:04,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:04,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:00:04,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:00:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:04,411 INFO L87 Difference]: Start difference. First operand 929 states and 2510 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:06,200 INFO L93 Difference]: Finished difference Result 1135 states and 2847 transitions. [2022-03-15 16:00:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:00:06,200 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:06,201 INFO L225 Difference]: With dead ends: 1135 [2022-03-15 16:00:06,201 INFO L226 Difference]: Without dead ends: 1087 [2022-03-15 16:00:06,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:00:06,202 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 131 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:06,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 452 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:00:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-03-15 16:00:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 939. [2022-03-15 16:00:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.7078891257995736) internal successors, (2540), 938 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2540 transitions. [2022-03-15 16:00:06,211 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2540 transitions. Word has length 20 [2022-03-15 16:00:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:06,211 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 2540 transitions. [2022-03-15 16:00:06,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2540 transitions. [2022-03-15 16:00:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:06,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:06,212 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:06,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (681)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:06,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 681 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2022-03-15 16:00:06,413 INFO L402 AbstractCegarLoop]: === Iteration 687 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2011193378, now seen corresponding path program 681 times [2022-03-15 16:00:06,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:06,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361077287] [2022-03-15 16:00:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:06,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:06,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361077287] [2022-03-15 16:00:06,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361077287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:06,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817055514] [2022-03-15 16:00:06,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:06,617 INFO L229 MonitoredProcess]: Starting monitored process 682 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:06,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (682)] Waiting until timeout for monitored process [2022-03-15 16:00:06,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:00:06,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:06,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:06,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:06,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:06,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 16:00:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:06,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:07,331 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:07,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 104 [2022-03-15 16:00:07,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-03-15 16:00:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:07,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817055514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:07,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:07,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 16:00:07,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429700120] [2022-03-15 16:00:07,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:07,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:07,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:07,469 INFO L87 Difference]: Start difference. First operand 939 states and 2540 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:08,199 INFO L93 Difference]: Finished difference Result 1117 states and 2881 transitions. [2022-03-15 16:00:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:00:08,199 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:08,201 INFO L225 Difference]: With dead ends: 1117 [2022-03-15 16:00:08,201 INFO L226 Difference]: Without dead ends: 1091 [2022-03-15 16:00:08,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:00:08,201 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:08,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 343 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 928 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-03-15 16:00:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-03-15 16:00:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 968. [2022-03-15 16:00:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 2.7156153050672183) internal successors, (2626), 967 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2626 transitions. [2022-03-15 16:00:08,212 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2626 transitions. Word has length 20 [2022-03-15 16:00:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:08,212 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 2626 transitions. [2022-03-15 16:00:08,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2626 transitions. [2022-03-15 16:00:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:08,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:08,213 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:08,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (682)] Ended with exit code 0 [2022-03-15 16:00:08,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2022-03-15 16:00:08,429 INFO L402 AbstractCegarLoop]: === Iteration 688 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash -56207530, now seen corresponding path program 682 times [2022-03-15 16:00:08,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:08,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833286057] [2022-03-15 16:00:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:08,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:08,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:08,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833286057] [2022-03-15 16:00:08,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833286057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:08,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684523086] [2022-03-15 16:00:08,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:08,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:08,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:08,647 INFO L229 MonitoredProcess]: Starting monitored process 683 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:08,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (683)] Waiting until timeout for monitored process [2022-03-15 16:00:08,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:08,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:08,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:08,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:08,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:08,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:08,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:08,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:08,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:09,388 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:09,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2022-03-15 16:00:09,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-03-15 16:00:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:09,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684523086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:09,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:09,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 16:00:09,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548003862] [2022-03-15 16:00:09,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:09,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:09,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:09,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:09,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:09,490 INFO L87 Difference]: Start difference. First operand 968 states and 2626 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:10,938 INFO L93 Difference]: Finished difference Result 1203 states and 3009 transitions. [2022-03-15 16:00:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:00:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:10,940 INFO L225 Difference]: With dead ends: 1203 [2022-03-15 16:00:10,940 INFO L226 Difference]: Without dead ends: 1158 [2022-03-15 16:00:10,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=2587, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:00:10,941 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:10,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 621 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1556 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-03-15 16:00:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-03-15 16:00:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 973. [2022-03-15 16:00:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 2.7181069958847734) internal successors, (2642), 972 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2642 transitions. [2022-03-15 16:00:10,952 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2642 transitions. Word has length 20 [2022-03-15 16:00:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 2642 transitions. [2022-03-15 16:00:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2642 transitions. [2022-03-15 16:00:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:10,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:10,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:10,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (683)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:11,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,683 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:11,169 INFO L402 AbstractCegarLoop]: === Iteration 689 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2092589006, now seen corresponding path program 683 times [2022-03-15 16:00:11,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:11,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736617602] [2022-03-15 16:00:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:11,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:11,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736617602] [2022-03-15 16:00:11,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736617602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:11,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413008646] [2022-03-15 16:00:11,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:11,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:11,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:11,376 INFO L229 MonitoredProcess]: Starting monitored process 684 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:11,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (684)] Waiting until timeout for monitored process [2022-03-15 16:00:11,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:00:11,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:11,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:11,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:11,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:11,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:11,976 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:11,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 16:00:11,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 16:00:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:12,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413008646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:12,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:12,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-03-15 16:00:12,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159448234] [2022-03-15 16:00:12,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:12,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:12,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:12,095 INFO L87 Difference]: Start difference. First operand 973 states and 2642 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:14,096 INFO L93 Difference]: Finished difference Result 1269 states and 3149 transitions. [2022-03-15 16:00:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:00:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:14,097 INFO L225 Difference]: With dead ends: 1269 [2022-03-15 16:00:14,097 INFO L226 Difference]: Without dead ends: 1215 [2022-03-15 16:00:14,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:00:14,098 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 182 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:14,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 475 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:00:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-03-15 16:00:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 979. [2022-03-15 16:00:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 2.721881390593047) internal successors, (2662), 978 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2662 transitions. [2022-03-15 16:00:14,108 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2662 transitions. Word has length 20 [2022-03-15 16:00:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:14,108 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 2662 transitions. [2022-03-15 16:00:14,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2662 transitions. [2022-03-15 16:00:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:14,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:14,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:14,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (684)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:14,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2022-03-15 16:00:14,310 INFO L402 AbstractCegarLoop]: === Iteration 690 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash -14195114, now seen corresponding path program 684 times [2022-03-15 16:00:14,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:14,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534991250] [2022-03-15 16:00:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:14,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:14,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534991250] [2022-03-15 16:00:14,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534991250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:14,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326177886] [2022-03-15 16:00:14,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:14,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:14,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:14,576 INFO L229 MonitoredProcess]: Starting monitored process 685 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:14,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (685)] Waiting until timeout for monitored process [2022-03-15 16:00:14,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:00:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:14,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:14,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:14,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:14,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:14,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:15,458 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:15,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 16:00:15,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 16:00:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:15,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326177886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:15,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:15,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 16:00:15,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780260488] [2022-03-15 16:00:15,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:15,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:00:15,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:00:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:00:15,597 INFO L87 Difference]: Start difference. First operand 979 states and 2662 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:17,505 INFO L93 Difference]: Finished difference Result 1281 states and 3177 transitions. [2022-03-15 16:00:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:00:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:17,507 INFO L225 Difference]: With dead ends: 1281 [2022-03-15 16:00:17,507 INFO L226 Difference]: Without dead ends: 1225 [2022-03-15 16:00:17,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:00:17,508 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 224 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:17,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 655 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:00:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-03-15 16:00:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 976. [2022-03-15 16:00:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 2.717948717948718) internal successors, (2650), 975 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2650 transitions. [2022-03-15 16:00:17,519 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2650 transitions. Word has length 20 [2022-03-15 16:00:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 2650 transitions. [2022-03-15 16:00:17,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2650 transitions. [2022-03-15 16:00:17,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:17,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:17,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:17,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (685)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:17,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,685 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:17,737 INFO L402 AbstractCegarLoop]: === Iteration 691 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash -899993394, now seen corresponding path program 685 times [2022-03-15 16:00:17,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:17,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764542548] [2022-03-15 16:00:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:17,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:17,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764542548] [2022-03-15 16:00:17,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764542548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:17,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735677742] [2022-03-15 16:00:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:17,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:17,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:17,917 INFO L229 MonitoredProcess]: Starting monitored process 686 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:17,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (686)] Waiting until timeout for monitored process [2022-03-15 16:00:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:18,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:18,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:18,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:18,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:18,639 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:18,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 16:00:18,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 16:00:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:18,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735677742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:18,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:18,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:00:18,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177687700] [2022-03-15 16:00:18,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:18,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:00:18,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:18,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:00:18,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:00:18,728 INFO L87 Difference]: Start difference. First operand 976 states and 2650 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:20,820 INFO L93 Difference]: Finished difference Result 1348 states and 3299 transitions. [2022-03-15 16:00:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:00:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:20,822 INFO L225 Difference]: With dead ends: 1348 [2022-03-15 16:00:20,822 INFO L226 Difference]: Without dead ends: 1290 [2022-03-15 16:00:20,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:00:20,822 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 187 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:20,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 537 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:00:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-03-15 16:00:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 958. [2022-03-15 16:00:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.716823406478579) internal successors, (2600), 957 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2600 transitions. [2022-03-15 16:00:20,834 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2600 transitions. Word has length 20 [2022-03-15 16:00:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:20,834 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2600 transitions. [2022-03-15 16:00:20,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2600 transitions. [2022-03-15 16:00:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:20,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:20,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:20,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (686)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:21,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,686 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:21,053 INFO L402 AbstractCegarLoop]: === Iteration 692 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -417438156, now seen corresponding path program 686 times [2022-03-15 16:00:21,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:21,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745359853] [2022-03-15 16:00:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:21,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:21,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745359853] [2022-03-15 16:00:21,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745359853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:21,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576870103] [2022-03-15 16:00:21,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:21,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:21,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:21,215 INFO L229 MonitoredProcess]: Starting monitored process 687 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:21,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (687)] Waiting until timeout for monitored process [2022-03-15 16:00:21,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:21,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:21,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:00:21,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:21,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 16:00:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:21,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:21,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:21,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2022-03-15 16:00:21,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:21,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2022-03-15 16:00:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:21,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576870103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:21,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:21,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:00:21,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152009783] [2022-03-15 16:00:21,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:21,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:21,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:21,948 INFO L87 Difference]: Start difference. First operand 958 states and 2600 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:22,325 INFO L93 Difference]: Finished difference Result 995 states and 2673 transitions. [2022-03-15 16:00:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:00:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:22,326 INFO L225 Difference]: With dead ends: 995 [2022-03-15 16:00:22,327 INFO L226 Difference]: Without dead ends: 988 [2022-03-15 16:00:22,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:00:22,327 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:22,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 200 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 465 Invalid, 0 Unknown, 194 Unchecked, 0.1s Time] [2022-03-15 16:00:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-03-15 16:00:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 965. [2022-03-15 16:00:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 2.712655601659751) internal successors, (2615), 964 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2615 transitions. [2022-03-15 16:00:22,336 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2615 transitions. Word has length 20 [2022-03-15 16:00:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:22,336 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 2615 transitions. [2022-03-15 16:00:22,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2615 transitions. [2022-03-15 16:00:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:22,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:22,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:22,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (687)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:22,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,687 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:22,553 INFO L402 AbstractCegarLoop]: === Iteration 693 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1190877026, now seen corresponding path program 687 times [2022-03-15 16:00:22,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:22,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042949775] [2022-03-15 16:00:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:22,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:22,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042949775] [2022-03-15 16:00:22,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042949775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:22,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233028496] [2022-03-15 16:00:22,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:22,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:22,784 INFO L229 MonitoredProcess]: Starting monitored process 688 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:22,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (688)] Waiting until timeout for monitored process [2022-03-15 16:00:22,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:00:22,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:22,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:22,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:23,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:23,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:00:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:23,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 16:00:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:23,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:23,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:23,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 83 [2022-03-15 16:00:23,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:23,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-03-15 16:00:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:23,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233028496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:23,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:23,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:00:23,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076195626] [2022-03-15 16:00:23,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:23,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:23,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:23,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:23,812 INFO L87 Difference]: Start difference. First operand 965 states and 2615 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:24,181 INFO L93 Difference]: Finished difference Result 994 states and 2663 transitions. [2022-03-15 16:00:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:00:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:24,183 INFO L225 Difference]: With dead ends: 994 [2022-03-15 16:00:24,183 INFO L226 Difference]: Without dead ends: 972 [2022-03-15 16:00:24,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:00:24,183 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:24,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 180 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 395 Unchecked, 0.1s Time] [2022-03-15 16:00:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-03-15 16:00:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 959. [2022-03-15 16:00:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.7160751565762005) internal successors, (2602), 958 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2602 transitions. [2022-03-15 16:00:24,193 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2602 transitions. Word has length 20 [2022-03-15 16:00:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:24,193 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2602 transitions. [2022-03-15 16:00:24,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2602 transitions. [2022-03-15 16:00:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:24,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:24,194 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:24,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (688)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:24,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,688 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:24,407 INFO L402 AbstractCegarLoop]: === Iteration 694 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1823586722, now seen corresponding path program 688 times [2022-03-15 16:00:24,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:24,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869873892] [2022-03-15 16:00:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:24,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:24,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:24,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869873892] [2022-03-15 16:00:24,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869873892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:24,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864620485] [2022-03-15 16:00:24,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:24,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:24,481 INFO L229 MonitoredProcess]: Starting monitored process 689 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:24,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (689)] Waiting until timeout for monitored process [2022-03-15 16:00:24,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:24,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:00:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:24,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:24,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 16:00:24,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:24,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 16:00:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:24,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:24,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:24,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 16:00:24,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:24,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-15 16:00:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:24,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864620485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:24,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:24,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:00:24,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573346234] [2022-03-15 16:00:24,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:24,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:24,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:24,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:24,809 INFO L87 Difference]: Start difference. First operand 959 states and 2602 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:24,940 INFO L93 Difference]: Finished difference Result 1038 states and 2762 transitions. [2022-03-15 16:00:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:00:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:24,942 INFO L225 Difference]: With dead ends: 1038 [2022-03-15 16:00:24,942 INFO L226 Difference]: Without dead ends: 1038 [2022-03-15 16:00:24,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:24,942 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:24,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 121 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-03-15 16:00:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-03-15 16:00:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 960. [2022-03-15 16:00:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 2.716371220020855) internal successors, (2605), 959 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 2605 transitions. [2022-03-15 16:00:24,959 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 2605 transitions. Word has length 20 [2022-03-15 16:00:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:24,959 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 2605 transitions. [2022-03-15 16:00:24,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 2605 transitions. [2022-03-15 16:00:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:24,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:24,961 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:24,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (689)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:25,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,689 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:25,177 INFO L402 AbstractCegarLoop]: === Iteration 695 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash -526863744, now seen corresponding path program 689 times [2022-03-15 16:00:25,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:25,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827515979] [2022-03-15 16:00:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:25,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:25,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:25,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827515979] [2022-03-15 16:00:25,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827515979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:25,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566208905] [2022-03-15 16:00:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:25,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:25,349 INFO L229 MonitoredProcess]: Starting monitored process 690 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:25,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (690)] Waiting until timeout for monitored process [2022-03-15 16:00:25,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:25,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:25,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 16:00:25,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:25,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:25,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:26,082 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:26,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:00:26,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:00:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:26,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566208905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:26,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:26,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:00:26,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808767601] [2022-03-15 16:00:26,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:26,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:00:26,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:00:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:00:26,186 INFO L87 Difference]: Start difference. First operand 960 states and 2605 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:27,130 INFO L93 Difference]: Finished difference Result 1305 states and 3237 transitions. [2022-03-15 16:00:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:00:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:27,132 INFO L225 Difference]: With dead ends: 1305 [2022-03-15 16:00:27,132 INFO L226 Difference]: Without dead ends: 1278 [2022-03-15 16:00:27,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:00:27,132 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 127 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 605 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1291 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-03-15 16:00:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-03-15 16:00:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 994. [2022-03-15 16:00:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.72809667673716) internal successors, (2709), 993 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2709 transitions. [2022-03-15 16:00:27,144 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2709 transitions. Word has length 20 [2022-03-15 16:00:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:27,144 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 2709 transitions. [2022-03-15 16:00:27,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2709 transitions. [2022-03-15 16:00:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:27,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:27,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:27,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (690)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:27,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2022-03-15 16:00:27,361 INFO L402 AbstractCegarLoop]: === Iteration 696 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1444813934, now seen corresponding path program 690 times [2022-03-15 16:00:27,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:27,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826314581] [2022-03-15 16:00:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:27,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:27,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826314581] [2022-03-15 16:00:27,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826314581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:27,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164160329] [2022-03-15 16:00:27,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:27,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:27,508 INFO L229 MonitoredProcess]: Starting monitored process 691 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:27,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (691)] Waiting until timeout for monitored process [2022-03-15 16:00:27,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:00:27,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:27,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:27,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:27,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:00:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:27,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:28,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:28,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 16:00:28,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:28,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 16:00:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:28,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164160329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:28,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:28,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:00:28,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541039865] [2022-03-15 16:00:28,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:28,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:28,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:28,486 INFO L87 Difference]: Start difference. First operand 994 states and 2709 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:28,965 INFO L93 Difference]: Finished difference Result 1014 states and 2746 transitions. [2022-03-15 16:00:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:00:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:28,966 INFO L225 Difference]: With dead ends: 1014 [2022-03-15 16:00:28,966 INFO L226 Difference]: Without dead ends: 1011 [2022-03-15 16:00:28,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:00:28,966 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:28,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 186 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 496 Invalid, 0 Unknown, 325 Unchecked, 0.2s Time] [2022-03-15 16:00:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-03-15 16:00:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 992. [2022-03-15 16:00:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.7295660948536833) internal successors, (2705), 991 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2705 transitions. [2022-03-15 16:00:28,976 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2705 transitions. Word has length 20 [2022-03-15 16:00:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:28,976 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 2705 transitions. [2022-03-15 16:00:28,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2705 transitions. [2022-03-15 16:00:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:28,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:28,977 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:28,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (691)] Ended with exit code 0 [2022-03-15 16:00:29,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2022-03-15 16:00:29,191 INFO L402 AbstractCegarLoop]: === Iteration 697 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1270721716, now seen corresponding path program 691 times [2022-03-15 16:00:29,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:29,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644671832] [2022-03-15 16:00:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:29,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:29,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644671832] [2022-03-15 16:00:29,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644671832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:29,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724168426] [2022-03-15 16:00:29,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:29,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:29,444 INFO L229 MonitoredProcess]: Starting monitored process 692 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:29,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (692)] Waiting until timeout for monitored process [2022-03-15 16:00:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:29,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:29,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:29,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:29,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:00:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:30,474 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:30,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:00:30,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:00:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:30,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724168426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:30,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:30,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:00:30,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206068598] [2022-03-15 16:00:30,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:30,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:00:30,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:00:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:00:30,583 INFO L87 Difference]: Start difference. First operand 992 states and 2705 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:31,547 INFO L93 Difference]: Finished difference Result 1300 states and 3247 transitions. [2022-03-15 16:00:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:00:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:31,550 INFO L225 Difference]: With dead ends: 1300 [2022-03-15 16:00:31,550 INFO L226 Difference]: Without dead ends: 1270 [2022-03-15 16:00:31,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:00:31,550 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 115 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:31,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 834 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1695 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-03-15 16:00:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-03-15 16:00:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 996. [2022-03-15 16:00:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 2.7306532663316583) internal successors, (2717), 995 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2717 transitions. [2022-03-15 16:00:31,562 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2717 transitions. Word has length 20 [2022-03-15 16:00:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:31,562 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 2717 transitions. [2022-03-15 16:00:31,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2717 transitions. [2022-03-15 16:00:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:31,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:31,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:31,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (692)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:31,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2022-03-15 16:00:31,779 INFO L402 AbstractCegarLoop]: === Iteration 698 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1605803008, now seen corresponding path program 692 times [2022-03-15 16:00:31,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:31,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193563404] [2022-03-15 16:00:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:31,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:31,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193563404] [2022-03-15 16:00:31,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193563404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:31,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438623493] [2022-03-15 16:00:31,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:31,909 INFO L229 MonitoredProcess]: Starting monitored process 693 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:31,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (693)] Waiting until timeout for monitored process [2022-03-15 16:00:31,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:31,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:32,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:00:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:32,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-15 16:00:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:32,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:32,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:32,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 16:00:32,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:32,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 66 [2022-03-15 16:00:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:32,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438623493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:32,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:32,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:00:32,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070919710] [2022-03-15 16:00:32,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:32,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:00:32,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:00:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:32,617 INFO L87 Difference]: Start difference. First operand 996 states and 2717 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:32,848 INFO L93 Difference]: Finished difference Result 1020 states and 2764 transitions. [2022-03-15 16:00:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:00:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:32,849 INFO L225 Difference]: With dead ends: 1020 [2022-03-15 16:00:32,849 INFO L226 Difference]: Without dead ends: 1013 [2022-03-15 16:00:32,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:00:32,850 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:32,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 171 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 514 Invalid, 0 Unknown, 298 Unchecked, 0.2s Time] [2022-03-15 16:00:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-15 16:00:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 996. [2022-03-15 16:00:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 2.7306532663316583) internal successors, (2717), 995 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2717 transitions. [2022-03-15 16:00:32,859 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2717 transitions. Word has length 20 [2022-03-15 16:00:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:32,859 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 2717 transitions. [2022-03-15 16:00:32,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2717 transitions. [2022-03-15 16:00:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:32,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:32,860 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:32,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (693)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2022-03-15 16:00:33,075 INFO L402 AbstractCegarLoop]: === Iteration 699 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash -461597900, now seen corresponding path program 693 times [2022-03-15 16:00:33,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:33,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834131148] [2022-03-15 16:00:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:33,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:33,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834131148] [2022-03-15 16:00:33,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834131148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:33,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306200287] [2022-03-15 16:00:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:33,278 INFO L229 MonitoredProcess]: Starting monitored process 694 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:33,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (694)] Waiting until timeout for monitored process [2022-03-15 16:00:33,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:00:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:33,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:33,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:33,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:33,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:33,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:33,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:34,088 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:34,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 16:00:34,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 16:00:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:34,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306200287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:34,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:34,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:00:34,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823761649] [2022-03-15 16:00:34,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:34,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:00:34,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:00:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:00:34,176 INFO L87 Difference]: Start difference. First operand 996 states and 2717 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:36,354 INFO L93 Difference]: Finished difference Result 1347 states and 3296 transitions. [2022-03-15 16:00:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:00:36,355 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:36,356 INFO L225 Difference]: With dead ends: 1347 [2022-03-15 16:00:36,356 INFO L226 Difference]: Without dead ends: 1293 [2022-03-15 16:00:36,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=322, Invalid=3460, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:00:36,357 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:36,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 721 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1509 Invalid, 0 Unknown, 344 Unchecked, 0.5s Time] [2022-03-15 16:00:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-03-15 16:00:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 998. [2022-03-15 16:00:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.729187562688064) internal successors, (2721), 997 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2721 transitions. [2022-03-15 16:00:36,368 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2721 transitions. Word has length 20 [2022-03-15 16:00:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:36,369 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2721 transitions. [2022-03-15 16:00:36,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2721 transitions. [2022-03-15 16:00:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:36,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:36,370 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:36,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (694)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 694 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2022-03-15 16:00:36,579 INFO L402 AbstractCegarLoop]: === Iteration 700 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 701914124, now seen corresponding path program 694 times [2022-03-15 16:00:36,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:36,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887072992] [2022-03-15 16:00:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:36,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:36,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:36,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887072992] [2022-03-15 16:00:36,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887072992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:36,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809903514] [2022-03-15 16:00:36,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:36,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:36,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:36,700 INFO L229 MonitoredProcess]: Starting monitored process 695 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:36,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (695)] Waiting until timeout for monitored process [2022-03-15 16:00:36,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:00:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:36,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:36,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-15 16:00:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:36,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-03-15 16:00:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:36,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:37,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:37,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-03-15 16:00:37,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:37,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-15 16:00:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:37,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809903514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:37,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:37,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:00:37,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788145092] [2022-03-15 16:00:37,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:37,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:37,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:37,192 INFO L87 Difference]: Start difference. First operand 998 states and 2721 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:37,316 INFO L93 Difference]: Finished difference Result 1129 states and 2999 transitions. [2022-03-15 16:00:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:00:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:37,317 INFO L225 Difference]: With dead ends: 1129 [2022-03-15 16:00:37,317 INFO L226 Difference]: Without dead ends: 1129 [2022-03-15 16:00:37,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:37,318 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:37,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 144 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 310 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2022-03-15 16:00:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-03-15 16:00:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 992. [2022-03-15 16:00:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.727547931382442) internal successors, (2703), 991 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2703 transitions. [2022-03-15 16:00:37,328 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2703 transitions. Word has length 20 [2022-03-15 16:00:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:37,328 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 2703 transitions. [2022-03-15 16:00:37,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2703 transitions. [2022-03-15 16:00:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:37,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:37,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:37,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (695)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:37,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,695 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:37,545 INFO L402 AbstractCegarLoop]: === Iteration 701 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -84139896, now seen corresponding path program 695 times [2022-03-15 16:00:37,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:37,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266665051] [2022-03-15 16:00:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:37,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:37,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266665051] [2022-03-15 16:00:37,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266665051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:37,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238582900] [2022-03-15 16:00:37,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:37,784 INFO L229 MonitoredProcess]: Starting monitored process 696 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:37,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (696)] Waiting until timeout for monitored process [2022-03-15 16:00:37,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:37,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:38,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:38,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:38,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:38,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 16:00:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:38,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:38,722 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:38,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 16:00:38,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 16:00:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:38,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238582900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:38,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:38,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-03-15 16:00:38,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954810468] [2022-03-15 16:00:38,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:38,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:00:38,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:00:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:00:38,874 INFO L87 Difference]: Start difference. First operand 992 states and 2703 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:39,619 INFO L93 Difference]: Finished difference Result 1088 states and 2883 transitions. [2022-03-15 16:00:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:00:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:39,621 INFO L225 Difference]: With dead ends: 1088 [2022-03-15 16:00:39,621 INFO L226 Difference]: Without dead ends: 1068 [2022-03-15 16:00:39,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:00:39,621 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:39,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 268 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 665 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-15 16:00:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-03-15 16:00:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 984. [2022-03-15 16:00:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.7202441505595116) internal successors, (2674), 983 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2674 transitions. [2022-03-15 16:00:39,632 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2674 transitions. Word has length 20 [2022-03-15 16:00:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2674 transitions. [2022-03-15 16:00:39,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2674 transitions. [2022-03-15 16:00:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:39,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:39,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:39,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (696)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:39,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 696 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2022-03-15 16:00:39,849 INFO L402 AbstractCegarLoop]: === Iteration 702 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash -614891674, now seen corresponding path program 696 times [2022-03-15 16:00:39,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:39,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007584502] [2022-03-15 16:00:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:40,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007584502] [2022-03-15 16:00:40,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007584502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:40,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705269894] [2022-03-15 16:00:40,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:40,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:40,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:40,022 INFO L229 MonitoredProcess]: Starting monitored process 697 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:40,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (697)] Waiting until timeout for monitored process [2022-03-15 16:00:40,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:00:40,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:40,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:40,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:40,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:40,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:40,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:40,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 16:00:40,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:40,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 16:00:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705269894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:40,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:40,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:00:40,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426522087] [2022-03-15 16:00:40,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:40,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:00:40,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:00:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:40,796 INFO L87 Difference]: Start difference. First operand 984 states and 2674 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:41,093 INFO L93 Difference]: Finished difference Result 1004 states and 2710 transitions. [2022-03-15 16:00:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:00:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:41,095 INFO L225 Difference]: With dead ends: 1004 [2022-03-15 16:00:41,095 INFO L226 Difference]: Without dead ends: 997 [2022-03-15 16:00:41,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:00:41,095 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:41,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 150 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 512 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-15 16:00:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-03-15 16:00:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 985. [2022-03-15 16:00:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.7215447154471546) internal successors, (2678), 984 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2678 transitions. [2022-03-15 16:00:41,105 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2678 transitions. Word has length 20 [2022-03-15 16:00:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:41,105 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 2678 transitions. [2022-03-15 16:00:41,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2678 transitions. [2022-03-15 16:00:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:41,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:41,106 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:41,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (697)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:41,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2022-03-15 16:00:41,307 INFO L402 AbstractCegarLoop]: === Iteration 703 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1500689954, now seen corresponding path program 697 times [2022-03-15 16:00:41,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:41,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341117201] [2022-03-15 16:00:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:41,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:41,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341117201] [2022-03-15 16:00:41,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341117201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:41,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301703694] [2022-03-15 16:00:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:41,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:41,538 INFO L229 MonitoredProcess]: Starting monitored process 698 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:41,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (698)] Waiting until timeout for monitored process [2022-03-15 16:00:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:41,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:41,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:41,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:41,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:41,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:41,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:42,280 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:42,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 16:00:42,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 16:00:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:42,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301703694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:42,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:42,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2022-03-15 16:00:42,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633946632] [2022-03-15 16:00:42,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:42,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:00:42,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:00:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:00:42,426 INFO L87 Difference]: Start difference. First operand 985 states and 2678 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:44,704 INFO L93 Difference]: Finished difference Result 1184 states and 3013 transitions. [2022-03-15 16:00:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:00:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:44,706 INFO L225 Difference]: With dead ends: 1184 [2022-03-15 16:00:44,706 INFO L226 Difference]: Without dead ends: 1137 [2022-03-15 16:00:44,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=317, Invalid=2989, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:00:44,706 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 127 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:44,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 518 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1189 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-03-15 16:00:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-03-15 16:00:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 995. [2022-03-15 16:00:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.727364185110664) internal successors, (2711), 994 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2711 transitions. [2022-03-15 16:00:44,717 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2711 transitions. Word has length 20 [2022-03-15 16:00:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:44,717 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 2711 transitions. [2022-03-15 16:00:44,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2711 transitions. [2022-03-15 16:00:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:44,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:44,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:44,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (698)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:44,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,698 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:44,934 INFO L402 AbstractCegarLoop]: === Iteration 704 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1463514146, now seen corresponding path program 698 times [2022-03-15 16:00:44,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:44,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47361776] [2022-03-15 16:00:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:44,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:45,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:45,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47361776] [2022-03-15 16:00:45,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47361776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:45,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40011272] [2022-03-15 16:00:45,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:45,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:45,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:45,207 INFO L229 MonitoredProcess]: Starting monitored process 699 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:45,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (699)] Waiting until timeout for monitored process [2022-03-15 16:00:45,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:45,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:45,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:45,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:45,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:45,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:45,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:45,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 76 [2022-03-15 16:00:45,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:45,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 52 [2022-03-15 16:00:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:45,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40011272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:45,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:45,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:00:45,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735669710] [2022-03-15 16:00:45,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:45,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:00:45,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:00:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:45,988 INFO L87 Difference]: Start difference. First operand 995 states and 2711 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:47,003 INFO L93 Difference]: Finished difference Result 1027 states and 2766 transitions. [2022-03-15 16:00:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:00:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:47,004 INFO L225 Difference]: With dead ends: 1027 [2022-03-15 16:00:47,004 INFO L226 Difference]: Without dead ends: 1017 [2022-03-15 16:00:47,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:00:47,005 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:47,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 144 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 695 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-03-15 16:00:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-03-15 16:00:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 995. [2022-03-15 16:00:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.72635814889336) internal successors, (2710), 994 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2710 transitions. [2022-03-15 16:00:47,015 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2710 transitions. Word has length 20 [2022-03-15 16:00:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:47,015 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 2710 transitions. [2022-03-15 16:00:47,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2710 transitions. [2022-03-15 16:00:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:47,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:47,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:47,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (699)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:47,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2022-03-15 16:00:47,232 INFO L402 AbstractCegarLoop]: === Iteration 705 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1209635968, now seen corresponding path program 699 times [2022-03-15 16:00:47,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:47,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221386457] [2022-03-15 16:00:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:47,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:47,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221386457] [2022-03-15 16:00:47,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221386457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:47,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330900441] [2022-03-15 16:00:47,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:47,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:47,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:47,424 INFO L229 MonitoredProcess]: Starting monitored process 700 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:47,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (700)] Waiting until timeout for monitored process [2022-03-15 16:00:47,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:00:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:47,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:47,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:47,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:47,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:00:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:47,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:48,036 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:48,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 16:00:48,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 16:00:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:48,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330900441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:48,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:48,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-03-15 16:00:48,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349349937] [2022-03-15 16:00:48,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:48,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:00:48,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:00:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:00:48,145 INFO L87 Difference]: Start difference. First operand 995 states and 2710 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:48,721 INFO L93 Difference]: Finished difference Result 1294 states and 3316 transitions. [2022-03-15 16:00:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:00:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:48,723 INFO L225 Difference]: With dead ends: 1294 [2022-03-15 16:00:48,723 INFO L226 Difference]: Without dead ends: 1272 [2022-03-15 16:00:48,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=1732, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:00:48,723 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:48,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 644 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1126 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2022-03-15 16:00:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-03-15 16:00:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1056. [2022-03-15 16:00:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.7412322274881515) internal successors, (2892), 1055 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2892 transitions. [2022-03-15 16:00:48,735 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2892 transitions. Word has length 20 [2022-03-15 16:00:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 2892 transitions. [2022-03-15 16:00:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2892 transitions. [2022-03-15 16:00:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:48,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:48,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:48,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (700)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:48,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,700 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:48,950 INFO L402 AbstractCegarLoop]: === Iteration 706 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1287745868, now seen corresponding path program 700 times [2022-03-15 16:00:48,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:48,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309134488] [2022-03-15 16:00:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:48,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:49,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:49,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309134488] [2022-03-15 16:00:49,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309134488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:49,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504151480] [2022-03-15 16:00:49,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:49,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:49,176 INFO L229 MonitoredProcess]: Starting monitored process 701 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:49,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (701)] Waiting until timeout for monitored process [2022-03-15 16:00:49,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:49,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:49,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:49,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 16:00:49,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:49,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:49,950 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:49,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:00:49,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:00:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:50,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504151480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:50,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:50,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-03-15 16:00:50,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090425158] [2022-03-15 16:00:50,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:50,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:00:50,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:00:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:00:50,082 INFO L87 Difference]: Start difference. First operand 1056 states and 2892 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:51,011 INFO L93 Difference]: Finished difference Result 1348 states and 3408 transitions. [2022-03-15 16:00:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:00:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:51,013 INFO L225 Difference]: With dead ends: 1348 [2022-03-15 16:00:51,013 INFO L226 Difference]: Without dead ends: 1322 [2022-03-15 16:00:51,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:00:51,014 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:51,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 795 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1548 Invalid, 0 Unknown, 322 Unchecked, 0.5s Time] [2022-03-15 16:00:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-15 16:00:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1060. [2022-03-15 16:00:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.7431539187913128) internal successors, (2905), 1059 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 2905 transitions. [2022-03-15 16:00:51,027 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 2905 transitions. Word has length 20 [2022-03-15 16:00:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:51,027 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 2905 transitions. [2022-03-15 16:00:51,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 2905 transitions. [2022-03-15 16:00:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:51,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:51,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:51,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (701)] Ended with exit code 0 [2022-03-15 16:00:51,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2022-03-15 16:00:51,245 INFO L402 AbstractCegarLoop]: === Iteration 707 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash -952664576, now seen corresponding path program 701 times [2022-03-15 16:00:51,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:51,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415197640] [2022-03-15 16:00:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:51,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:51,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415197640] [2022-03-15 16:00:51,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415197640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:51,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637243689] [2022-03-15 16:00:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:51,415 INFO L229 MonitoredProcess]: Starting monitored process 702 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:51,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (702)] Waiting until timeout for monitored process [2022-03-15 16:00:51,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:00:51,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:51,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:51,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:51,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:51,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:00:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:51,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:52,116 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:52,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:00:52,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:00:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:52,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637243689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:52,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:52,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-03-15 16:00:52,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056939154] [2022-03-15 16:00:52,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:52,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:00:52,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:00:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:00:52,208 INFO L87 Difference]: Start difference. First operand 1060 states and 2905 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:52,923 INFO L93 Difference]: Finished difference Result 1315 states and 3351 transitions. [2022-03-15 16:00:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:00:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:52,926 INFO L225 Difference]: With dead ends: 1315 [2022-03-15 16:00:52,926 INFO L226 Difference]: Without dead ends: 1288 [2022-03-15 16:00:52,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:00:52,926 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:52,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 541 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1088 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-03-15 16:00:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-03-15 16:00:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1061. [2022-03-15 16:00:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.7424528301886792) internal successors, (2907), 1060 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 2907 transitions. [2022-03-15 16:00:52,939 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 2907 transitions. Word has length 20 [2022-03-15 16:00:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:52,939 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 2907 transitions. [2022-03-15 16:00:52,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 2907 transitions. [2022-03-15 16:00:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:52,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:52,940 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:52,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (702)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:53,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,702 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:53,156 INFO L402 AbstractCegarLoop]: === Iteration 708 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1274901812, now seen corresponding path program 702 times [2022-03-15 16:00:53,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:53,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537282528] [2022-03-15 16:00:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:53,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:53,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537282528] [2022-03-15 16:00:53,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537282528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:53,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442603186] [2022-03-15 16:00:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:53,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:53,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:53,343 INFO L229 MonitoredProcess]: Starting monitored process 703 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:53,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (703)] Waiting until timeout for monitored process [2022-03-15 16:00:53,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:00:53,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:53,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:53,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:53,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:53,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:53,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:53,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 77 [2022-03-15 16:00:53,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:53,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-03-15 16:00:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:54,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442603186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:54,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:54,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:00:54,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920978347] [2022-03-15 16:00:54,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:54,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:00:54,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:00:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:54,073 INFO L87 Difference]: Start difference. First operand 1061 states and 2907 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:54,762 INFO L93 Difference]: Finished difference Result 1083 states and 2950 transitions. [2022-03-15 16:00:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:00:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:54,763 INFO L225 Difference]: With dead ends: 1083 [2022-03-15 16:00:54,763 INFO L226 Difference]: Without dead ends: 1076 [2022-03-15 16:00:54,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:00:54,763 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:54,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 168 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 810 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2022-03-15 16:00:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-15 16:00:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1061. [2022-03-15 16:00:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.7424528301886792) internal successors, (2907), 1060 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 2907 transitions. [2022-03-15 16:00:54,774 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 2907 transitions. Word has length 20 [2022-03-15 16:00:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:54,774 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 2907 transitions. [2022-03-15 16:00:54,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 2907 transitions. [2022-03-15 16:00:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:54,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:54,775 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:54,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (703)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:54,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,703 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:54,978 INFO L402 AbstractCegarLoop]: === Iteration 709 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash 389103532, now seen corresponding path program 703 times [2022-03-15 16:00:54,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:54,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110949121] [2022-03-15 16:00:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:55,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:55,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110949121] [2022-03-15 16:00:55,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110949121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:55,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639996404] [2022-03-15 16:00:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:55,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:55,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:55,161 INFO L229 MonitoredProcess]: Starting monitored process 704 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:55,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (704)] Waiting until timeout for monitored process [2022-03-15 16:00:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:55,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:55,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:55,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:55,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:55,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:55,782 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:00:55,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 16:00:55,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 16:00:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:55,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639996404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:55,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:55,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2022-03-15 16:00:55,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358855481] [2022-03-15 16:00:55,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:55,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:00:55,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:00:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:00:55,907 INFO L87 Difference]: Start difference. First operand 1061 states and 2907 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:57,177 INFO L93 Difference]: Finished difference Result 1270 states and 3262 transitions. [2022-03-15 16:00:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:00:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:57,179 INFO L225 Difference]: With dead ends: 1270 [2022-03-15 16:00:57,179 INFO L226 Difference]: Without dead ends: 1230 [2022-03-15 16:00:57,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:00:57,180 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:57,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 550 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1260 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-03-15 16:00:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-03-15 16:00:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1058. [2022-03-15 16:00:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.737937559129612) internal successors, (2894), 1057 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2894 transitions. [2022-03-15 16:00:57,191 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2894 transitions. Word has length 20 [2022-03-15 16:00:57,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:57,191 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 2894 transitions. [2022-03-15 16:00:57,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2894 transitions. [2022-03-15 16:00:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:57,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:57,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:57,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (704)] Ended with exit code 0 [2022-03-15 16:00:57,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,704 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:57,395 INFO L402 AbstractCegarLoop]: === Iteration 710 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -181031458, now seen corresponding path program 704 times [2022-03-15 16:00:57,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:57,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739338219] [2022-03-15 16:00:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:57,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:57,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739338219] [2022-03-15 16:00:57,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739338219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:57,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865291614] [2022-03-15 16:00:57,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:57,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:57,611 INFO L229 MonitoredProcess]: Starting monitored process 705 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:57,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (705)] Waiting until timeout for monitored process [2022-03-15 16:00:57,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:57,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:57,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:00:57,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:57,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:57,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:57,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:57,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:57,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:58,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:58,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-15 16:00:58,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:58,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-03-15 16:00:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:58,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865291614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:58,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:58,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 16:00:58,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767747270] [2022-03-15 16:00:58,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:58,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:00:58,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:00:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:00:58,230 INFO L87 Difference]: Start difference. First operand 1058 states and 2894 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:58,978 INFO L93 Difference]: Finished difference Result 1126 states and 3011 transitions. [2022-03-15 16:00:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:00:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:00:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:58,980 INFO L225 Difference]: With dead ends: 1126 [2022-03-15 16:00:58,980 INFO L226 Difference]: Without dead ends: 1102 [2022-03-15 16:00:58,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:00:58,980 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:58,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 192 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 985 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-03-15 16:00:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-03-15 16:00:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1063. [2022-03-15 16:00:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.7401129943502824) internal successors, (2910), 1062 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2910 transitions. [2022-03-15 16:00:58,991 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2910 transitions. Word has length 20 [2022-03-15 16:00:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:58,991 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 2910 transitions. [2022-03-15 16:00:58,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2910 transitions. [2022-03-15 16:00:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:00:58,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:58,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:59,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (705)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:59,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,705 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:59,207 INFO L402 AbstractCegarLoop]: === Iteration 711 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:59,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:59,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1967765078, now seen corresponding path program 705 times [2022-03-15 16:00:59,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:59,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363739177] [2022-03-15 16:00:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:59,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:59,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:59,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363739177] [2022-03-15 16:00:59,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363739177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:59,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967197361] [2022-03-15 16:00:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:59,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:59,351 INFO L229 MonitoredProcess]: Starting monitored process 706 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:59,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (706)] Waiting until timeout for monitored process [2022-03-15 16:00:59,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:00:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:00:59,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:59,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:00:59,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:59,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:00:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:59,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:59,940 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:59,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 98 [2022-03-15 16:00:59,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-03-15 16:01:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:00,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967197361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:00,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:00,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:01:00,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747356053] [2022-03-15 16:01:00,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:00,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:01:00,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:01:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:00,090 INFO L87 Difference]: Start difference. First operand 1063 states and 2910 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:02,380 INFO L93 Difference]: Finished difference Result 1320 states and 3318 transitions. [2022-03-15 16:01:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:01:02,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:02,382 INFO L225 Difference]: With dead ends: 1320 [2022-03-15 16:01:02,382 INFO L226 Difference]: Without dead ends: 1273 [2022-03-15 16:01:02,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:01:02,382 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 137 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:02,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 614 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:01:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-03-15 16:01:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1070. [2022-03-15 16:01:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.744621141253508) internal successors, (2934), 1069 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2934 transitions. [2022-03-15 16:01:02,393 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2934 transitions. Word has length 20 [2022-03-15 16:01:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:02,393 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 2934 transitions. [2022-03-15 16:01:02,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2934 transitions. [2022-03-15 16:01:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:02,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:02,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:02,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (706)] Ended with exit code 0 [2022-03-15 16:01:02,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2022-03-15 16:01:02,595 INFO L402 AbstractCegarLoop]: === Iteration 712 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 235809758, now seen corresponding path program 706 times [2022-03-15 16:01:02,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:02,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325596683] [2022-03-15 16:01:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:02,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:02,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325596683] [2022-03-15 16:01:02,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325596683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:02,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508257821] [2022-03-15 16:01:02,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:02,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:02,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:02,858 INFO L229 MonitoredProcess]: Starting monitored process 707 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:02,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (707)] Waiting until timeout for monitored process [2022-03-15 16:01:02,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:02,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:02,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:03,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:03,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:03,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:03,746 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:03,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 16:01:03,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 16:01:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:03,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508257821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:03,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:03,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:01:03,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221570062] [2022-03-15 16:01:03,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:03,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:01:03,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:03,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:01:03,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:03,871 INFO L87 Difference]: Start difference. First operand 1070 states and 2934 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:05,003 INFO L93 Difference]: Finished difference Result 1232 states and 3226 transitions. [2022-03-15 16:01:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:01:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:05,005 INFO L225 Difference]: With dead ends: 1232 [2022-03-15 16:01:05,005 INFO L226 Difference]: Without dead ends: 1216 [2022-03-15 16:01:05,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:01:05,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:05,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 336 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 957 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2022-03-15 16:01:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-03-15 16:01:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1075. [2022-03-15 16:01:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 2.7486033519553073) internal successors, (2952), 1074 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 2952 transitions. [2022-03-15 16:01:05,017 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 2952 transitions. Word has length 20 [2022-03-15 16:01:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:05,017 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 2952 transitions. [2022-03-15 16:01:05,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 2952 transitions. [2022-03-15 16:01:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:05,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:05,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:05,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (707)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:05,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,707 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:05,232 INFO L402 AbstractCegarLoop]: === Iteration 713 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -293632632, now seen corresponding path program 707 times [2022-03-15 16:01:05,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:05,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112209558] [2022-03-15 16:01:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:05,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:05,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112209558] [2022-03-15 16:01:05,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112209558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:05,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603591700] [2022-03-15 16:01:05,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:05,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:05,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:05,386 INFO L229 MonitoredProcess]: Starting monitored process 708 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:05,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (708)] Waiting until timeout for monitored process [2022-03-15 16:01:05,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:01:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:05,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:05,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:05,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:05,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 16:01:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:05,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:05,844 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:05,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-03-15 16:01:05,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 78 [2022-03-15 16:01:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:05,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603591700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:05,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:05,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 32 [2022-03-15 16:01:05,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718495273] [2022-03-15 16:01:05,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:05,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:01:05,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:01:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:05,933 INFO L87 Difference]: Start difference. First operand 1075 states and 2952 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:06,463 INFO L93 Difference]: Finished difference Result 1170 states and 3108 transitions. [2022-03-15 16:01:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:01:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:06,465 INFO L225 Difference]: With dead ends: 1170 [2022-03-15 16:01:06,465 INFO L226 Difference]: Without dead ends: 1145 [2022-03-15 16:01:06,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:01:06,465 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:06,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 202 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:01:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-03-15 16:01:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1076. [2022-03-15 16:01:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 2.747906976744186) internal successors, (2954), 1075 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 2954 transitions. [2022-03-15 16:01:06,477 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 2954 transitions. Word has length 20 [2022-03-15 16:01:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 2954 transitions. [2022-03-15 16:01:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 2954 transitions. [2022-03-15 16:01:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:06,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:06,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:06,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (708)] Ended with exit code 0 [2022-03-15 16:01:06,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,708 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:06,684 INFO L402 AbstractCegarLoop]: === Iteration 714 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash -954635084, now seen corresponding path program 708 times [2022-03-15 16:01:06,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:06,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094925546] [2022-03-15 16:01:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:06,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:06,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094925546] [2022-03-15 16:01:06,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094925546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:06,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028924659] [2022-03-15 16:01:06,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:06,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:06,907 INFO L229 MonitoredProcess]: Starting monitored process 709 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:06,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (709)] Waiting until timeout for monitored process [2022-03-15 16:01:06,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:01:06,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:06,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:07,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:07,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:07,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:07,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 16:01:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:07,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:07,619 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:07,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:01:07,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:01:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:07,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028924659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:07,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:07,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2022-03-15 16:01:07,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721076066] [2022-03-15 16:01:07,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:07,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:01:07,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:01:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:01:07,730 INFO L87 Difference]: Start difference. First operand 1076 states and 2954 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:08,355 INFO L93 Difference]: Finished difference Result 1319 states and 3441 transitions. [2022-03-15 16:01:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:01:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:08,357 INFO L225 Difference]: With dead ends: 1319 [2022-03-15 16:01:08,357 INFO L226 Difference]: Without dead ends: 1296 [2022-03-15 16:01:08,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:01:08,357 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:08,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 590 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1256 Invalid, 0 Unknown, 171 Unchecked, 0.4s Time] [2022-03-15 16:01:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-03-15 16:01:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1114. [2022-03-15 16:01:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.761006289308176) internal successors, (3073), 1113 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3073 transitions. [2022-03-15 16:01:08,370 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3073 transitions. Word has length 20 [2022-03-15 16:01:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:08,370 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 3073 transitions. [2022-03-15 16:01:08,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3073 transitions. [2022-03-15 16:01:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:08,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:08,371 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:08,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (709)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:08,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable713 [2022-03-15 16:01:08,585 INFO L402 AbstractCegarLoop]: === Iteration 715 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:08,585 INFO L85 PathProgramCache]: Analyzing trace with hash -619553792, now seen corresponding path program 709 times [2022-03-15 16:01:08,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:08,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069722419] [2022-03-15 16:01:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:08,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:08,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:08,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069722419] [2022-03-15 16:01:08,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069722419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:08,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211662408] [2022-03-15 16:01:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:08,730 INFO L229 MonitoredProcess]: Starting monitored process 710 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:08,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (710)] Waiting until timeout for monitored process [2022-03-15 16:01:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:08,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:08,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:08,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:08,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:01:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:09,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:09,354 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:09,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 16:01:09,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 16:01:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:09,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211662408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:09,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:09,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2022-03-15 16:01:09,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230893546] [2022-03-15 16:01:09,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:09,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:01:09,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:01:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:01:09,455 INFO L87 Difference]: Start difference. First operand 1114 states and 3073 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:10,080 INFO L93 Difference]: Finished difference Result 1324 states and 3441 transitions. [2022-03-15 16:01:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:01:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:10,082 INFO L225 Difference]: With dead ends: 1324 [2022-03-15 16:01:10,082 INFO L226 Difference]: Without dead ends: 1304 [2022-03-15 16:01:10,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:01:10,083 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:10,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 591 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1262 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-03-15 16:01:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-03-15 16:01:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1115. [2022-03-15 16:01:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.7603231597845603) internal successors, (3075), 1114 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3075 transitions. [2022-03-15 16:01:10,097 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3075 transitions. Word has length 20 [2022-03-15 16:01:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:10,097 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 3075 transitions. [2022-03-15 16:01:10,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3075 transitions. [2022-03-15 16:01:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:10,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:10,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:10,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (710)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:10,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 710 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2022-03-15 16:01:10,314 INFO L402 AbstractCegarLoop]: === Iteration 716 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1608012596, now seen corresponding path program 710 times [2022-03-15 16:01:10,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:10,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888730878] [2022-03-15 16:01:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:10,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888730878] [2022-03-15 16:01:10,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888730878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546504869] [2022-03-15 16:01:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:10,490 INFO L229 MonitoredProcess]: Starting monitored process 711 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:10,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (711)] Waiting until timeout for monitored process [2022-03-15 16:01:10,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:10,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:10,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:10,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:10,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:10,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:10,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:10,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:11,159 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:11,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 16:01:11,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 16:01:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:11,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546504869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:11,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:11,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2022-03-15 16:01:11,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254061926] [2022-03-15 16:01:11,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:11,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:01:11,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:01:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:01:11,263 INFO L87 Difference]: Start difference. First operand 1115 states and 3075 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:12,593 INFO L93 Difference]: Finished difference Result 1431 states and 3611 transitions. [2022-03-15 16:01:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:01:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:12,595 INFO L225 Difference]: With dead ends: 1431 [2022-03-15 16:01:12,595 INFO L226 Difference]: Without dead ends: 1391 [2022-03-15 16:01:12,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:01:12,596 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 155 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:12,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 482 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1092 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-03-15 16:01:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-03-15 16:01:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1116. [2022-03-15 16:01:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.759641255605381) internal successors, (3077), 1115 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3077 transitions. [2022-03-15 16:01:12,613 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3077 transitions. Word has length 20 [2022-03-15 16:01:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:12,613 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3077 transitions. [2022-03-15 16:01:12,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3077 transitions. [2022-03-15 16:01:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:12,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:12,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:12,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (711)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:12,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable715 [2022-03-15 16:01:12,835 INFO L402 AbstractCegarLoop]: === Iteration 717 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1037877606, now seen corresponding path program 711 times [2022-03-15 16:01:12,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:12,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019465493] [2022-03-15 16:01:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:12,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:12,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019465493] [2022-03-15 16:01:12,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019465493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:12,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219600256] [2022-03-15 16:01:12,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:12,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:12,987 INFO L229 MonitoredProcess]: Starting monitored process 712 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:12,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (712)] Waiting until timeout for monitored process [2022-03-15 16:01:13,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:01:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:13,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:13,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:13,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:13,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:13,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:13,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:13,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 118 [2022-03-15 16:01:13,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:13,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 90 [2022-03-15 16:01:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:13,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219600256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:13,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:13,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 16:01:13,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731007045] [2022-03-15 16:01:13,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:13,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:01:13,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:13,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:01:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:01:13,600 INFO L87 Difference]: Start difference. First operand 1116 states and 3077 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:13,966 INFO L93 Difference]: Finished difference Result 1137 states and 3116 transitions. [2022-03-15 16:01:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:01:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:13,968 INFO L225 Difference]: With dead ends: 1137 [2022-03-15 16:01:13,968 INFO L226 Difference]: Without dead ends: 1130 [2022-03-15 16:01:13,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:01:13,968 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:13,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 599 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-03-15 16:01:13,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-03-15 16:01:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1118. [2022-03-15 16:01:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 2.7609668755595345) internal successors, (3084), 1117 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3084 transitions. [2022-03-15 16:01:13,979 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3084 transitions. Word has length 20 [2022-03-15 16:01:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:13,980 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3084 transitions. [2022-03-15 16:01:13,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3084 transitions. [2022-03-15 16:01:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:13,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:13,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:13,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (712)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:14,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,712 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:14,197 INFO L402 AbstractCegarLoop]: === Iteration 718 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1108293154, now seen corresponding path program 712 times [2022-03-15 16:01:14,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:14,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900413407] [2022-03-15 16:01:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:14,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:14,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900413407] [2022-03-15 16:01:14,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900413407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:14,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520304894] [2022-03-15 16:01:14,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:14,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:14,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:14,349 INFO L229 MonitoredProcess]: Starting monitored process 713 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:14,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (713)] Waiting until timeout for monitored process [2022-03-15 16:01:14,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:14,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:14,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:14,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:14,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:14,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:14,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:14,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:14,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:14,889 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:14,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 98 [2022-03-15 16:01:14,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-03-15 16:01:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:14,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520304894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:14,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:14,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 32 [2022-03-15 16:01:14,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278834033] [2022-03-15 16:01:14,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:14,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:01:14,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:01:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:14,997 INFO L87 Difference]: Start difference. First operand 1118 states and 3084 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:16,958 INFO L93 Difference]: Finished difference Result 1428 states and 3580 transitions. [2022-03-15 16:01:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:01:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:16,961 INFO L225 Difference]: With dead ends: 1428 [2022-03-15 16:01:16,961 INFO L226 Difference]: Without dead ends: 1381 [2022-03-15 16:01:16,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=296, Invalid=2566, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:01:16,961 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 179 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:16,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 540 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:01:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-03-15 16:01:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1126. [2022-03-15 16:01:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 2.7671111111111113) internal successors, (3113), 1125 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 3113 transitions. [2022-03-15 16:01:16,974 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 3113 transitions. Word has length 20 [2022-03-15 16:01:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:16,974 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 3113 transitions. [2022-03-15 16:01:16,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 3113 transitions. [2022-03-15 16:01:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:16,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:16,975 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:16,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (713)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:17,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,713 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:17,191 INFO L402 AbstractCegarLoop]: === Iteration 719 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 782575364, now seen corresponding path program 713 times [2022-03-15 16:01:17,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:17,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400245046] [2022-03-15 16:01:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:17,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:17,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:17,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400245046] [2022-03-15 16:01:17,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400245046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:17,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637064525] [2022-03-15 16:01:17,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:17,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:17,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:17,310 INFO L229 MonitoredProcess]: Starting monitored process 714 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:17,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (714)] Waiting until timeout for monitored process [2022-03-15 16:01:17,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:01:17,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:01:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:17,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:17,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-03-15 16:01:17,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:17,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-15 16:01:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:17,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:17,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-03-15 16:01:17,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:17,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-15 16:01:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:17,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637064525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:17,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:17,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:01:17,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975828289] [2022-03-15 16:01:17,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:17,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:17,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:17,695 INFO L87 Difference]: Start difference. First operand 1126 states and 3113 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:17,917 INFO L93 Difference]: Finished difference Result 1200 states and 3252 transitions. [2022-03-15 16:01:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:01:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:17,918 INFO L225 Difference]: With dead ends: 1200 [2022-03-15 16:01:17,918 INFO L226 Difference]: Without dead ends: 1200 [2022-03-15 16:01:17,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:01:17,919 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:17,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 125 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 447 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-03-15 16:01:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-03-15 16:01:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1125. [2022-03-15 16:01:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.7660142348754446) internal successors, (3109), 1124 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3109 transitions. [2022-03-15 16:01:17,930 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3109 transitions. Word has length 20 [2022-03-15 16:01:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:17,930 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3109 transitions. [2022-03-15 16:01:17,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3109 transitions. [2022-03-15 16:01:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:17,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:17,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (714)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:18,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,714 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:18,131 INFO L402 AbstractCegarLoop]: === Iteration 720 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 152079326, now seen corresponding path program 714 times [2022-03-15 16:01:18,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:18,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215669378] [2022-03-15 16:01:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:18,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:18,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:18,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215669378] [2022-03-15 16:01:18,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215669378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:18,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882925388] [2022-03-15 16:01:18,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:18,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:18,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:18,346 INFO L229 MonitoredProcess]: Starting monitored process 715 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:18,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (715)] Waiting until timeout for monitored process [2022-03-15 16:01:18,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:01:18,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:18,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:18,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:18,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:18,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:19,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:19,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-15 16:01:19,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:19,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-03-15 16:01:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:19,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882925388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:19,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:19,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 16:01:19,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212311150] [2022-03-15 16:01:19,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:01:19,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:01:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:01:19,172 INFO L87 Difference]: Start difference. First operand 1125 states and 3109 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:19,681 INFO L93 Difference]: Finished difference Result 1145 states and 3139 transitions. [2022-03-15 16:01:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:01:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:19,683 INFO L225 Difference]: With dead ends: 1145 [2022-03-15 16:01:19,683 INFO L226 Difference]: Without dead ends: 1133 [2022-03-15 16:01:19,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:01:19,683 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:19,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 111 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 641 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-03-15 16:01:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-15 16:01:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1124. [2022-03-15 16:01:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.764915405164737) internal successors, (3105), 1123 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3105 transitions. [2022-03-15 16:01:19,694 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3105 transitions. Word has length 20 [2022-03-15 16:01:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:19,694 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 3105 transitions. [2022-03-15 16:01:19,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3105 transitions. [2022-03-15 16:01:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:19,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:19,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:19,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (715)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:19,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,715 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:19,896 INFO L402 AbstractCegarLoop]: === Iteration 721 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1729421056, now seen corresponding path program 715 times [2022-03-15 16:01:19,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:19,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082537953] [2022-03-15 16:01:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:19,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:20,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:20,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082537953] [2022-03-15 16:01:20,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082537953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:20,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756062313] [2022-03-15 16:01:20,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:20,125 INFO L229 MonitoredProcess]: Starting monitored process 716 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:20,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (716)] Waiting until timeout for monitored process [2022-03-15 16:01:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:20,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:20,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:20,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:20,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 16:01:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:20,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:20,769 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:20,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 91 [2022-03-15 16:01:20,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 66 [2022-03-15 16:01:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:01:20,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756062313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:20,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:20,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 32 [2022-03-15 16:01:20,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968050493] [2022-03-15 16:01:20,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:20,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:01:20,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:01:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:20,906 INFO L87 Difference]: Start difference. First operand 1124 states and 3105 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:22,108 INFO L93 Difference]: Finished difference Result 1262 states and 3359 transitions. [2022-03-15 16:01:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:01:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:22,111 INFO L225 Difference]: With dead ends: 1262 [2022-03-15 16:01:22,111 INFO L226 Difference]: Without dead ends: 1244 [2022-03-15 16:01:22,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:01:22,112 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:22,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 289 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:01:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-03-15 16:01:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1142. [2022-03-15 16:01:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.7738825591586327) internal successors, (3165), 1141 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3165 transitions. [2022-03-15 16:01:22,137 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3165 transitions. Word has length 20 [2022-03-15 16:01:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:22,137 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3165 transitions. [2022-03-15 16:01:22,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3165 transitions. [2022-03-15 16:01:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:22,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:22,138 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:22,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (716)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:22,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2022-03-15 16:01:22,354 INFO L402 AbstractCegarLoop]: === Iteration 722 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash 194091742, now seen corresponding path program 716 times [2022-03-15 16:01:22,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:22,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219715588] [2022-03-15 16:01:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:22,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:22,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:22,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219715588] [2022-03-15 16:01:22,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219715588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:22,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613475256] [2022-03-15 16:01:22,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:22,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:22,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:22,594 INFO L229 MonitoredProcess]: Starting monitored process 717 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:22,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (717)] Waiting until timeout for monitored process [2022-03-15 16:01:22,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:22,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:22,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:22,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:22,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:22,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:23,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:23,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 132 [2022-03-15 16:01:23,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:23,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 92 [2022-03-15 16:01:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:23,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613475256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:23,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:23,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 16:01:23,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203463788] [2022-03-15 16:01:23,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:23,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:01:23,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:01:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:01:23,648 INFO L87 Difference]: Start difference. First operand 1142 states and 3165 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:24,537 INFO L93 Difference]: Finished difference Result 1192 states and 3250 transitions. [2022-03-15 16:01:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:01:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:24,539 INFO L225 Difference]: With dead ends: 1192 [2022-03-15 16:01:24,539 INFO L226 Difference]: Without dead ends: 1175 [2022-03-15 16:01:24,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:01:24,540 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:24,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 147 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:01:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-03-15 16:01:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1146. [2022-03-15 16:01:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.7755458515283844) internal successors, (3178), 1145 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3178 transitions. [2022-03-15 16:01:24,552 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3178 transitions. Word has length 20 [2022-03-15 16:01:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:24,552 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 3178 transitions. [2022-03-15 16:01:24,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3178 transitions. [2022-03-15 16:01:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:24,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:24,553 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:24,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (717)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:24,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,717 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:24,753 INFO L402 AbstractCegarLoop]: === Iteration 723 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1855734272, now seen corresponding path program 717 times [2022-03-15 16:01:24,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:24,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031824652] [2022-03-15 16:01:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:24,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:24,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031824652] [2022-03-15 16:01:24,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031824652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:24,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012714016] [2022-03-15 16:01:24,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:24,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:24,985 INFO L229 MonitoredProcess]: Starting monitored process 718 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:24,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (718)] Waiting until timeout for monitored process [2022-03-15 16:01:25,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:01:25,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:25,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:25,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-15 16:01:25,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:25,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:25,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:25,705 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:25,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 104 [2022-03-15 16:01:25,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-03-15 16:01:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:25,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012714016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:25,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:25,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:01:25,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999239558] [2022-03-15 16:01:25,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:01:25,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:01:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:25,861 INFO L87 Difference]: Start difference. First operand 1146 states and 3178 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:26,461 INFO L93 Difference]: Finished difference Result 1327 states and 3536 transitions. [2022-03-15 16:01:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:01:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:26,464 INFO L225 Difference]: With dead ends: 1327 [2022-03-15 16:01:26,464 INFO L226 Difference]: Without dead ends: 1307 [2022-03-15 16:01:26,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:01:26,464 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 64 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:26,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 447 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1014 Invalid, 0 Unknown, 7 Unchecked, 0.4s Time] [2022-03-15 16:01:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-03-15 16:01:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1174. [2022-03-15 16:01:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 2.7809036658141517) internal successors, (3262), 1173 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3262 transitions. [2022-03-15 16:01:26,481 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3262 transitions. Word has length 20 [2022-03-15 16:01:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:26,481 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 3262 transitions. [2022-03-15 16:01:26,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3262 transitions. [2022-03-15 16:01:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:26,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:26,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:26,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (718)] Ended with exit code 0 [2022-03-15 16:01:26,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable722,718 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:26,698 INFO L402 AbstractCegarLoop]: === Iteration 724 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash 371832116, now seen corresponding path program 718 times [2022-03-15 16:01:26,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:26,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212672601] [2022-03-15 16:01:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:26,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:26,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:26,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212672601] [2022-03-15 16:01:26,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212672601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:26,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546358790] [2022-03-15 16:01:26,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:26,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:26,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:26,865 INFO L229 MonitoredProcess]: Starting monitored process 719 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:26,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (719)] Waiting until timeout for monitored process [2022-03-15 16:01:26,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:26,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:27,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:27,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:27,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:27,405 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:27,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 16:01:27,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 16:01:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:27,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546358790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:27,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:27,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:01:27,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330424698] [2022-03-15 16:01:27,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:27,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:01:27,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:01:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:27,512 INFO L87 Difference]: Start difference. First operand 1174 states and 3262 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:28,262 INFO L93 Difference]: Finished difference Result 1389 states and 3627 transitions. [2022-03-15 16:01:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:01:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:28,264 INFO L225 Difference]: With dead ends: 1389 [2022-03-15 16:01:28,264 INFO L226 Difference]: Without dead ends: 1356 [2022-03-15 16:01:28,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:01:28,265 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 112 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:28,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 481 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1146 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-03-15 16:01:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-03-15 16:01:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1175. [2022-03-15 16:01:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 2.7802385008517887) internal successors, (3264), 1174 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3264 transitions. [2022-03-15 16:01:28,278 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3264 transitions. Word has length 20 [2022-03-15 16:01:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:28,278 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 3264 transitions. [2022-03-15 16:01:28,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3264 transitions. [2022-03-15 16:01:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:28,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:28,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:28,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (719)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:28,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2022-03-15 16:01:28,495 INFO L402 AbstractCegarLoop]: === Iteration 725 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:28,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1774338644, now seen corresponding path program 719 times [2022-03-15 16:01:28,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:28,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777435497] [2022-03-15 16:01:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:28,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:28,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777435497] [2022-03-15 16:01:28,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777435497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:28,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071061206] [2022-03-15 16:01:28,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:28,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:28,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:28,649 INFO L229 MonitoredProcess]: Starting monitored process 720 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:28,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (720)] Waiting until timeout for monitored process [2022-03-15 16:01:28,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:01:28,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:28,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:28,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:28,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:28,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:29,181 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:29,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 16:01:29,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 16:01:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:29,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071061206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:29,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:29,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:01:29,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956668965] [2022-03-15 16:01:29,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:29,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:01:29,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:01:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:29,295 INFO L87 Difference]: Start difference. First operand 1175 states and 3264 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:30,847 INFO L93 Difference]: Finished difference Result 1423 states and 3679 transitions. [2022-03-15 16:01:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:01:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:30,850 INFO L225 Difference]: With dead ends: 1423 [2022-03-15 16:01:30,850 INFO L226 Difference]: Without dead ends: 1376 [2022-03-15 16:01:30,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=304, Invalid=2666, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:01:30,851 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 169 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:30,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 466 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:01:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-03-15 16:01:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1181. [2022-03-15 16:01:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.783050847457627) internal successors, (3284), 1180 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3284 transitions. [2022-03-15 16:01:30,866 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3284 transitions. Word has length 20 [2022-03-15 16:01:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:30,866 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 3284 transitions. [2022-03-15 16:01:30,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3284 transitions. [2022-03-15 16:01:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:30,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:30,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:30,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (720)] Ended with exit code 0 [2022-03-15 16:01:31,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,720 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:31,084 INFO L402 AbstractCegarLoop]: === Iteration 726 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash 413844532, now seen corresponding path program 720 times [2022-03-15 16:01:31,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:31,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762229222] [2022-03-15 16:01:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:31,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:31,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:31,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762229222] [2022-03-15 16:01:31,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762229222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:31,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702230928] [2022-03-15 16:01:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:31,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:31,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:31,268 INFO L229 MonitoredProcess]: Starting monitored process 721 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:31,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (721)] Waiting until timeout for monitored process [2022-03-15 16:01:31,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:01:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:31,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:31,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:31,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:31,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:31,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:31,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:31,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 16:01:31,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:31,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 16:01:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:32,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702230928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:32,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:32,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 16:01:32,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426946919] [2022-03-15 16:01:32,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:01:32,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:01:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:01:32,072 INFO L87 Difference]: Start difference. First operand 1181 states and 3284 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:32,415 INFO L93 Difference]: Finished difference Result 1218 states and 3352 transitions. [2022-03-15 16:01:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:01:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:32,417 INFO L225 Difference]: With dead ends: 1218 [2022-03-15 16:01:32,417 INFO L226 Difference]: Without dead ends: 1204 [2022-03-15 16:01:32,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:01:32,417 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:32,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 150 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:01:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-15 16:01:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1184. [2022-03-15 16:01:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.7844463229078613) internal successors, (3294), 1183 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3294 transitions. [2022-03-15 16:01:32,430 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3294 transitions. Word has length 20 [2022-03-15 16:01:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:32,430 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 3294 transitions. [2022-03-15 16:01:32,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3294 transitions. [2022-03-15 16:01:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:32,431 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:32,431 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:32,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (721)] Ended with exit code 0 [2022-03-15 16:01:32,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,721 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:32,635 INFO L402 AbstractCegarLoop]: === Iteration 727 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash -471953748, now seen corresponding path program 721 times [2022-03-15 16:01:32,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:32,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274229670] [2022-03-15 16:01:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:32,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:32,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:32,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274229670] [2022-03-15 16:01:32,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274229670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:32,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593392242] [2022-03-15 16:01:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:32,908 INFO L229 MonitoredProcess]: Starting monitored process 722 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:32,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (722)] Waiting until timeout for monitored process [2022-03-15 16:01:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:33,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:33,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:33,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:33,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:33,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:33,579 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:33,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 16:01:33,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 16:01:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:33,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593392242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:33,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:33,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-03-15 16:01:33,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706685006] [2022-03-15 16:01:33,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:33,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:01:33,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:01:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:01:33,676 INFO L87 Difference]: Start difference. First operand 1184 states and 3294 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:35,500 INFO L93 Difference]: Finished difference Result 1453 states and 3752 transitions. [2022-03-15 16:01:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:01:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:35,502 INFO L225 Difference]: With dead ends: 1453 [2022-03-15 16:01:35,502 INFO L226 Difference]: Without dead ends: 1392 [2022-03-15 16:01:35,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=409, Invalid=3881, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:01:35,503 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:35,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 592 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:01:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-03-15 16:01:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1179. [2022-03-15 16:01:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.7792869269949065) internal successors, (3274), 1178 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3274 transitions. [2022-03-15 16:01:35,517 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3274 transitions. Word has length 20 [2022-03-15 16:01:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:35,517 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 3274 transitions. [2022-03-15 16:01:35,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3274 transitions. [2022-03-15 16:01:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:35,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:35,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:35,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (722)] Ended with exit code 0 [2022-03-15 16:01:35,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726,722 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:35,734 INFO L402 AbstractCegarLoop]: === Iteration 728 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2133070644, now seen corresponding path program 722 times [2022-03-15 16:01:35,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:35,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356332561] [2022-03-15 16:01:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:35,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:35,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356332561] [2022-03-15 16:01:35,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356332561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:35,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636513659] [2022-03-15 16:01:35,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:35,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:35,910 INFO L229 MonitoredProcess]: Starting monitored process 723 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:35,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (723)] Waiting until timeout for monitored process [2022-03-15 16:01:35,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:35,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:36,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:36,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:36,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:36,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:36,770 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:36,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 16:01:36,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 16:01:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:36,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636513659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:36,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:36,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:01:36,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440486903] [2022-03-15 16:01:36,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:01:36,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:01:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:01:36,857 INFO L87 Difference]: Start difference. First operand 1179 states and 3274 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:39,123 INFO L93 Difference]: Finished difference Result 1518 states and 3861 transitions. [2022-03-15 16:01:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:01:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:39,126 INFO L225 Difference]: With dead ends: 1518 [2022-03-15 16:01:39,126 INFO L226 Difference]: Without dead ends: 1464 [2022-03-15 16:01:39,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=356, Invalid=3550, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:01:39,126 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 171 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:39,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 510 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:01:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-15 16:01:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1193. [2022-03-15 16:01:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.780201342281879) internal successors, (3314), 1192 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3314 transitions. [2022-03-15 16:01:39,141 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3314 transitions. Word has length 20 [2022-03-15 16:01:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:39,141 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 3314 transitions. [2022-03-15 16:01:39,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3314 transitions. [2022-03-15 16:01:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:39,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:39,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:39,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (723)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:39,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2022-03-15 16:01:39,359 INFO L402 AbstractCegarLoop]: === Iteration 729 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1229031764, now seen corresponding path program 723 times [2022-03-15 16:01:39,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:39,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161078206] [2022-03-15 16:01:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:39,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:39,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161078206] [2022-03-15 16:01:39,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161078206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:39,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913269803] [2022-03-15 16:01:39,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:39,519 INFO L229 MonitoredProcess]: Starting monitored process 724 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:39,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (724)] Waiting until timeout for monitored process [2022-03-15 16:01:39,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:01:39,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:39,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:39,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:01:39,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:39,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:39,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:40,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:40,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 16:01:40,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:40,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 66 [2022-03-15 16:01:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:40,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913269803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:40,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:40,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:01:40,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75477571] [2022-03-15 16:01:40,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:40,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:01:40,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:01:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:40,205 INFO L87 Difference]: Start difference. First operand 1193 states and 3314 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:40,736 INFO L93 Difference]: Finished difference Result 1231 states and 3385 transitions. [2022-03-15 16:01:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:01:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:40,738 INFO L225 Difference]: With dead ends: 1231 [2022-03-15 16:01:40,738 INFO L226 Difference]: Without dead ends: 1209 [2022-03-15 16:01:40,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:01:40,738 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:40,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 182 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:01:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-03-15 16:01:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1194. [2022-03-15 16:01:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.779547359597653) internal successors, (3316), 1193 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3316 transitions. [2022-03-15 16:01:40,752 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3316 transitions. Word has length 20 [2022-03-15 16:01:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:40,752 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 3316 transitions. [2022-03-15 16:01:40,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3316 transitions. [2022-03-15 16:01:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:40,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:40,753 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:40,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (724)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:40,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,724 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:40,979 INFO L402 AbstractCegarLoop]: === Iteration 730 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1338457352, now seen corresponding path program 724 times [2022-03-15 16:01:40,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:40,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860375043] [2022-03-15 16:01:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:41,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:41,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860375043] [2022-03-15 16:01:41,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860375043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:41,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722942930] [2022-03-15 16:01:41,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:41,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:41,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:41,130 INFO L229 MonitoredProcess]: Starting monitored process 725 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (725)] Waiting until timeout for monitored process [2022-03-15 16:01:41,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:41,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:41,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:41,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-15 16:01:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:41,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:41,789 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:41,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 116 [2022-03-15 16:01:41,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-03-15 16:01:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:41,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722942930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:41,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:41,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:01:41,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804491843] [2022-03-15 16:01:41,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:01:41,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:01:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:01:41,871 INFO L87 Difference]: Start difference. First operand 1194 states and 3316 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:42,855 INFO L93 Difference]: Finished difference Result 1570 states and 4031 transitions. [2022-03-15 16:01:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:01:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:42,858 INFO L225 Difference]: With dead ends: 1570 [2022-03-15 16:01:42,858 INFO L226 Difference]: Without dead ends: 1537 [2022-03-15 16:01:42,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:01:42,858 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 130 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:42,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 650 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:01:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-03-15 16:01:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1240. [2022-03-15 16:01:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.798224374495561) internal successors, (3467), 1239 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3467 transitions. [2022-03-15 16:01:42,873 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3467 transitions. Word has length 20 [2022-03-15 16:01:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:42,873 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3467 transitions. [2022-03-15 16:01:42,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3467 transitions. [2022-03-15 16:01:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:42,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:42,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:42,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (725)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:43,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,725 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:43,079 INFO L402 AbstractCegarLoop]: === Iteration 731 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash 459128108, now seen corresponding path program 725 times [2022-03-15 16:01:43,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:43,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733994795] [2022-03-15 16:01:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:43,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:43,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733994795] [2022-03-15 16:01:43,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733994795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:43,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024382143] [2022-03-15 16:01:43,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:43,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:43,326 INFO L229 MonitoredProcess]: Starting monitored process 726 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:43,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (726)] Waiting until timeout for monitored process [2022-03-15 16:01:43,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:01:43,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:43,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:43,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:43,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:43,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:43,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:43,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 16:01:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:43,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:44,235 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:44,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:01:44,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:01:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:44,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024382143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:44,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:44,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-15 16:01:44,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160354297] [2022-03-15 16:01:44,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:44,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:01:44,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:01:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:01:44,358 INFO L87 Difference]: Start difference. First operand 1240 states and 3467 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:45,930 INFO L93 Difference]: Finished difference Result 1584 states and 4073 transitions. [2022-03-15 16:01:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:01:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:45,933 INFO L225 Difference]: With dead ends: 1584 [2022-03-15 16:01:45,933 INFO L226 Difference]: Without dead ends: 1554 [2022-03-15 16:01:45,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=199, Invalid=2153, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:01:45,934 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 100 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:45,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 928 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:01:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-03-15 16:01:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1245. [2022-03-15 16:01:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.79983922829582) internal successors, (3483), 1244 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3483 transitions. [2022-03-15 16:01:45,954 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3483 transitions. Word has length 20 [2022-03-15 16:01:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:45,954 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3483 transitions. [2022-03-15 16:01:45,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3483 transitions. [2022-03-15 16:01:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:45,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:45,955 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:45,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (726)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:46,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2022-03-15 16:01:46,172 INFO L402 AbstractCegarLoop]: === Iteration 732 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 794209400, now seen corresponding path program 726 times [2022-03-15 16:01:46,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:46,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887710213] [2022-03-15 16:01:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:46,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:46,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887710213] [2022-03-15 16:01:46,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887710213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:46,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348109820] [2022-03-15 16:01:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:46,377 INFO L229 MonitoredProcess]: Starting monitored process 727 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:46,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (727)] Waiting until timeout for monitored process [2022-03-15 16:01:46,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:01:46,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:46,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:46,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:46,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 16:01:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:46,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:47,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:47,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 16:01:47,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:47,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93 [2022-03-15 16:01:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:47,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348109820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:47,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:47,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:01:47,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15228487] [2022-03-15 16:01:47,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:01:47,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:01:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:47,429 INFO L87 Difference]: Start difference. First operand 1245 states and 3483 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:47,795 INFO L93 Difference]: Finished difference Result 1273 states and 3534 transitions. [2022-03-15 16:01:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:01:47,795 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:47,797 INFO L225 Difference]: With dead ends: 1273 [2022-03-15 16:01:47,797 INFO L226 Difference]: Without dead ends: 1267 [2022-03-15 16:01:47,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:01:47,797 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:47,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 609 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-03-15 16:01:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-15 16:01:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1250. [2022-03-15 16:01:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.799039231385108) internal successors, (3496), 1249 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3496 transitions. [2022-03-15 16:01:47,809 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3496 transitions. Word has length 20 [2022-03-15 16:01:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:47,809 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 3496 transitions. [2022-03-15 16:01:47,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3496 transitions. [2022-03-15 16:01:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:47,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:47,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:47,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (727)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:48,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable731,727 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:48,026 INFO L402 AbstractCegarLoop]: === Iteration 733 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1089178794, now seen corresponding path program 727 times [2022-03-15 16:01:48,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:48,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296965783] [2022-03-15 16:01:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:48,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:48,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:48,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296965783] [2022-03-15 16:01:48,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296965783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:48,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80861425] [2022-03-15 16:01:48,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:48,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:48,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:48,288 INFO L229 MonitoredProcess]: Starting monitored process 728 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:48,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (728)] Waiting until timeout for monitored process [2022-03-15 16:01:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:48,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:48,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:48,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:48,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-15 16:01:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:49,337 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:49,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 104 [2022-03-15 16:01:49,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-03-15 16:01:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:49,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80861425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:49,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:49,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:01:49,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36584398] [2022-03-15 16:01:49,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:49,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:01:49,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:01:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:01:49,458 INFO L87 Difference]: Start difference. First operand 1250 states and 3496 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:50,606 INFO L93 Difference]: Finished difference Result 1549 states and 4011 transitions. [2022-03-15 16:01:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:01:50,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:50,609 INFO L225 Difference]: With dead ends: 1549 [2022-03-15 16:01:50,609 INFO L226 Difference]: Without dead ends: 1522 [2022-03-15 16:01:50,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=2338, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:01:50,609 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 100 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:50,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 781 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:01:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-03-15 16:01:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1238. [2022-03-15 16:01:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.795472918350849) internal successors, (3458), 1237 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3458 transitions. [2022-03-15 16:01:50,644 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3458 transitions. Word has length 20 [2022-03-15 16:01:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:50,644 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 3458 transitions. [2022-03-15 16:01:50,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3458 transitions. [2022-03-15 16:01:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:50,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:50,645 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:50,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (728)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:50,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2022-03-15 16:01:50,861 INFO L402 AbstractCegarLoop]: === Iteration 734 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1273191508, now seen corresponding path program 728 times [2022-03-15 16:01:50,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:50,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832748] [2022-03-15 16:01:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:51,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:51,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832748] [2022-03-15 16:01:51,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:51,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475336705] [2022-03-15 16:01:51,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:51,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:51,010 INFO L229 MonitoredProcess]: Starting monitored process 729 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:51,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (729)] Waiting until timeout for monitored process [2022-03-15 16:01:51,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:01:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:51,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:51,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:51,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:51,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:51,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:51,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:51,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 92 [2022-03-15 16:01:51,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:51,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 60 [2022-03-15 16:01:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:51,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475336705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:51,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:51,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:01:51,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440506930] [2022-03-15 16:01:51,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:51,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:01:51,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:01:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:51,758 INFO L87 Difference]: Start difference. First operand 1238 states and 3458 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:52,084 INFO L93 Difference]: Finished difference Result 1258 states and 3497 transitions. [2022-03-15 16:01:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:01:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:52,106 INFO L225 Difference]: With dead ends: 1258 [2022-03-15 16:01:52,106 INFO L226 Difference]: Without dead ends: 1251 [2022-03-15 16:01:52,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:01:52,106 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:52,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 153 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:01:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-03-15 16:01:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1238. [2022-03-15 16:01:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.795472918350849) internal successors, (3458), 1237 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3458 transitions. [2022-03-15 16:01:52,118 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3458 transitions. Word has length 20 [2022-03-15 16:01:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:52,118 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 3458 transitions. [2022-03-15 16:01:52,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3458 transitions. [2022-03-15 16:01:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:52,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:52,120 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:52,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (729)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:52,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 729 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2022-03-15 16:01:52,336 INFO L402 AbstractCegarLoop]: === Iteration 735 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1331832884, now seen corresponding path program 729 times [2022-03-15 16:01:52,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:52,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283823557] [2022-03-15 16:01:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:52,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:52,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283823557] [2022-03-15 16:01:52,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283823557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:52,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913608954] [2022-03-15 16:01:52,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:52,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:52,511 INFO L229 MonitoredProcess]: Starting monitored process 730 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:52,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (730)] Waiting until timeout for monitored process [2022-03-15 16:01:52,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:01:52,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:52,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:52,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:52,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:52,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:53,578 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:53,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 114 [2022-03-15 16:01:53,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-03-15 16:01:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:53,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913608954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:53,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:53,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-03-15 16:01:53,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48050606] [2022-03-15 16:01:53,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:01:53,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:01:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:01:53,740 INFO L87 Difference]: Start difference. First operand 1238 states and 3458 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:56,606 INFO L93 Difference]: Finished difference Result 1593 states and 4043 transitions. [2022-03-15 16:01:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:01:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:56,608 INFO L225 Difference]: With dead ends: 1593 [2022-03-15 16:01:56,608 INFO L226 Difference]: Without dead ends: 1532 [2022-03-15 16:01:56,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=431, Invalid=4399, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:01:56,609 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 171 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:56,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 680 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:01:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-03-15 16:01:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1236. [2022-03-15 16:01:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 2.791093117408907) internal successors, (3447), 1235 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3447 transitions. [2022-03-15 16:01:56,623 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3447 transitions. Word has length 20 [2022-03-15 16:01:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:56,623 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 3447 transitions. [2022-03-15 16:01:56,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3447 transitions. [2022-03-15 16:01:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:56,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:56,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:56,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (730)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:56,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2022-03-15 16:01:56,839 INFO L402 AbstractCegarLoop]: === Iteration 736 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1982683734, now seen corresponding path program 730 times [2022-03-15 16:01:56,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:56,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110667838] [2022-03-15 16:01:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:56,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:56,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110667838] [2022-03-15 16:01:56,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110667838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:56,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081243536] [2022-03-15 16:01:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:56,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:56,990 INFO L229 MonitoredProcess]: Starting monitored process 731 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:56,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (731)] Waiting until timeout for monitored process [2022-03-15 16:01:57,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:57,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:01:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:57,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:57,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:01:57,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:57,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:01:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:57,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:57,622 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:01:57,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 104 [2022-03-15 16:01:57,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 71 [2022-03-15 16:01:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:57,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081243536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:57,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:57,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-03-15 16:01:57,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488919683] [2022-03-15 16:01:57,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:57,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:01:57,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:01:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:57,718 INFO L87 Difference]: Start difference. First operand 1236 states and 3447 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:59,967 INFO L93 Difference]: Finished difference Result 1539 states and 3960 transitions. [2022-03-15 16:01:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:01:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:01:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:59,969 INFO L225 Difference]: With dead ends: 1539 [2022-03-15 16:01:59,969 INFO L226 Difference]: Without dead ends: 1485 [2022-03-15 16:01:59,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=374, Invalid=3658, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:01:59,969 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 147 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:59,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 869 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:01:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2022-03-15 16:01:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1248. [2022-03-15 16:01:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.7947072975140337) internal successors, (3485), 1247 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3485 transitions. [2022-03-15 16:01:59,983 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3485 transitions. Word has length 20 [2022-03-15 16:01:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3485 transitions. [2022-03-15 16:01:59,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3485 transitions. [2022-03-15 16:01:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:01:59,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:59,984 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (731)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:00,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,731 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:00,199 INFO L402 AbstractCegarLoop]: === Iteration 737 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:00,199 INFO L85 PathProgramCache]: Analyzing trace with hash 488047020, now seen corresponding path program 731 times [2022-03-15 16:02:00,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:00,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556721058] [2022-03-15 16:02:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:00,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:00,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556721058] [2022-03-15 16:02:00,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556721058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:00,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641993101] [2022-03-15 16:02:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:00,354 INFO L229 MonitoredProcess]: Starting monitored process 732 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:00,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (732)] Waiting until timeout for monitored process [2022-03-15 16:02:00,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:02:00,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:00,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:02:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:00,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:00,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:00,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:00,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:01,030 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:01,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 86 [2022-03-15 16:02:01,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-03-15 16:02:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:01,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641993101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:01,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:01,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:02:01,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259872454] [2022-03-15 16:02:01,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:01,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:02:01,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:02:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:01,137 INFO L87 Difference]: Start difference. First operand 1248 states and 3485 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:01,678 INFO L93 Difference]: Finished difference Result 1465 states and 3866 transitions. [2022-03-15 16:02:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:02:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:01,680 INFO L225 Difference]: With dead ends: 1465 [2022-03-15 16:02:01,680 INFO L226 Difference]: Without dead ends: 1432 [2022-03-15 16:02:01,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:02:01,681 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 117 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:01,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 348 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 850 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-03-15 16:02:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2022-03-15 16:02:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1243. [2022-03-15 16:02:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 2.789855072463768) internal successors, (3465), 1242 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 3465 transitions. [2022-03-15 16:02:01,697 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 3465 transitions. Word has length 20 [2022-03-15 16:02:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:01,697 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 3465 transitions. [2022-03-15 16:02:01,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 3465 transitions. [2022-03-15 16:02:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:01,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:01,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:01,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (732)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:01,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,732 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:01,914 INFO L402 AbstractCegarLoop]: === Iteration 738 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1453241344, now seen corresponding path program 732 times [2022-03-15 16:02:01,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:01,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536761356] [2022-03-15 16:02:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:01,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:02,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:02,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536761356] [2022-03-15 16:02:02,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536761356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:02,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822730607] [2022-03-15 16:02:02,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:02,057 INFO L229 MonitoredProcess]: Starting monitored process 733 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:02,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (733)] Waiting until timeout for monitored process [2022-03-15 16:02:02,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:02:02,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:02,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:02:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:02,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:02,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:02:02,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:02,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:02,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:02,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:02,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2022-03-15 16:02:02,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:02,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 51 [2022-03-15 16:02:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:02,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822730607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:02,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:02,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 16:02:02,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866438648] [2022-03-15 16:02:02,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:02,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:02:02,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:02:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:02:02,715 INFO L87 Difference]: Start difference. First operand 1243 states and 3465 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:02,981 INFO L93 Difference]: Finished difference Result 1263 states and 3499 transitions. [2022-03-15 16:02:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:02:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:02,983 INFO L225 Difference]: With dead ends: 1263 [2022-03-15 16:02:02,983 INFO L226 Difference]: Without dead ends: 1256 [2022-03-15 16:02:02,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:02,983 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:02,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 559 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-03-15 16:02:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-03-15 16:02:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1243. [2022-03-15 16:02:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 2.789855072463768) internal successors, (3465), 1242 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 3465 transitions. [2022-03-15 16:02:02,995 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 3465 transitions. Word has length 20 [2022-03-15 16:02:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 3465 transitions. [2022-03-15 16:02:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 3465 transitions. [2022-03-15 16:02:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:02,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:02,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:03,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (733)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:03,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2022-03-15 16:02:03,211 INFO L402 AbstractCegarLoop]: === Iteration 739 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2019859542, now seen corresponding path program 733 times [2022-03-15 16:02:03,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:03,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655581355] [2022-03-15 16:02:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:03,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:03,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655581355] [2022-03-15 16:02:03,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655581355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:03,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400792602] [2022-03-15 16:02:03,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:03,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:03,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:03,412 INFO L229 MonitoredProcess]: Starting monitored process 734 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:03,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (734)] Waiting until timeout for monitored process [2022-03-15 16:02:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:02:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:03,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:03,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:03,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:03,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:04,088 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:02:04,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 96 [2022-03-15 16:02:04,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 63 [2022-03-15 16:02:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:04,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400792602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:04,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:04,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2022-03-15 16:02:04,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47052595] [2022-03-15 16:02:04,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:04,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:02:04,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:02:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:02:04,172 INFO L87 Difference]: Start difference. First operand 1243 states and 3465 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:05,770 INFO L93 Difference]: Finished difference Result 1497 states and 3937 transitions. [2022-03-15 16:02:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:02:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:05,772 INFO L225 Difference]: With dead ends: 1497 [2022-03-15 16:02:05,772 INFO L226 Difference]: Without dead ends: 1478 [2022-03-15 16:02:05,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=263, Invalid=2389, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:02:05,773 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:05,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 492 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:02:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-03-15 16:02:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1261. [2022-03-15 16:02:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.796031746031746) internal successors, (3523), 1260 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3523 transitions. [2022-03-15 16:02:05,787 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3523 transitions. Word has length 20 [2022-03-15 16:02:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:05,787 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3523 transitions. [2022-03-15 16:02:05,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3523 transitions. [2022-03-15 16:02:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:05,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:05,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:05,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (734)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,734 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:06,004 INFO L402 AbstractCegarLoop]: === Iteration 740 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1176073678, now seen corresponding path program 734 times [2022-03-15 16:02:06,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:06,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469161499] [2022-03-15 16:02:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:06,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:06,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:06,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469161499] [2022-03-15 16:02:06,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469161499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:06,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476949198] [2022-03-15 16:02:06,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:06,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:06,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:06,277 INFO L229 MonitoredProcess]: Starting monitored process 735 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:06,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (735)] Waiting until timeout for monitored process [2022-03-15 16:02:06,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:02:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:06,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:06,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:06,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:06,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:07,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:07,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 118 [2022-03-15 16:02:07,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:07,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 90 [2022-03-15 16:02:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:07,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476949198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:07,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:07,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 16:02:07,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432952750] [2022-03-15 16:02:07,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:07,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:02:07,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:02:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:02:07,133 INFO L87 Difference]: Start difference. First operand 1261 states and 3523 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:07,501 INFO L93 Difference]: Finished difference Result 1286 states and 3569 transitions. [2022-03-15 16:02:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:02:07,501 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:07,503 INFO L225 Difference]: With dead ends: 1286 [2022-03-15 16:02:07,503 INFO L226 Difference]: Without dead ends: 1279 [2022-03-15 16:02:07,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:02:07,503 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:07,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 121 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 648 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-03-15 16:02:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-03-15 16:02:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1265. [2022-03-15 16:02:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 2.795094936708861) internal successors, (3533), 1264 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 3533 transitions. [2022-03-15 16:02:07,516 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 3533 transitions. Word has length 20 [2022-03-15 16:02:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 3533 transitions. [2022-03-15 16:02:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 3533 transitions. [2022-03-15 16:02:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:07,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:07,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:07,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (735)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:07,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,735 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:07,731 INFO L402 AbstractCegarLoop]: === Iteration 741 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash -513869226, now seen corresponding path program 735 times [2022-03-15 16:02:07,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:07,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781332113] [2022-03-15 16:02:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:07,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:07,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781332113] [2022-03-15 16:02:07,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781332113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:07,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127147] [2022-03-15 16:02:07,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:02:07,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:07,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:07,935 INFO L229 MonitoredProcess]: Starting monitored process 736 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:07,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (736)] Waiting until timeout for monitored process [2022-03-15 16:02:07,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:02:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:02:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:08,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:08,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:08,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:08,655 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:08,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 98 [2022-03-15 16:02:08,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-03-15 16:02:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:02:08,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:08,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:08,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 32 [2022-03-15 16:02:08,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108514729] [2022-03-15 16:02:08,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:08,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:02:08,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:02:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:02:08,749 INFO L87 Difference]: Start difference. First operand 1265 states and 3533 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:09,387 INFO L93 Difference]: Finished difference Result 1402 states and 3774 transitions. [2022-03-15 16:02:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:02:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:09,390 INFO L225 Difference]: With dead ends: 1402 [2022-03-15 16:02:09,390 INFO L226 Difference]: Without dead ends: 1383 [2022-03-15 16:02:09,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:02:09,390 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:09,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 337 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 937 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-03-15 16:02:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-03-15 16:02:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1265. [2022-03-15 16:02:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 2.7974683544303796) internal successors, (3536), 1264 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 3536 transitions. [2022-03-15 16:02:09,409 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 3536 transitions. Word has length 20 [2022-03-15 16:02:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:09,409 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 3536 transitions. [2022-03-15 16:02:09,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 3536 transitions. [2022-03-15 16:02:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:09,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:09,411 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:09,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (736)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:09,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable740,736 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:09,624 INFO L402 AbstractCegarLoop]: === Iteration 742 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1277255032, now seen corresponding path program 736 times [2022-03-15 16:02:09,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:09,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463082200] [2022-03-15 16:02:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:09,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:09,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463082200] [2022-03-15 16:02:09,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463082200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:09,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981531561] [2022-03-15 16:02:09,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:02:09,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:09,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:09,831 INFO L229 MonitoredProcess]: Starting monitored process 737 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:09,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (737)] Waiting until timeout for monitored process [2022-03-15 16:02:09,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:02:09,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:02:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:10,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:10,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:02:10,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:10,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:02:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:10,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:10,313 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:10,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2022-03-15 16:02:10,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-03-15 16:02:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:10,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981531561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:10,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:10,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:02:10,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608739835] [2022-03-15 16:02:10,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:10,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:02:10,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:02:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:10,418 INFO L87 Difference]: Start difference. First operand 1265 states and 3536 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:11,240 INFO L93 Difference]: Finished difference Result 1489 states and 3985 transitions. [2022-03-15 16:02:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:02:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:11,243 INFO L225 Difference]: With dead ends: 1489 [2022-03-15 16:02:11,243 INFO L226 Difference]: Without dead ends: 1462 [2022-03-15 16:02:11,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:02:11,243 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:11,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 485 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:02:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-03-15 16:02:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1297. [2022-03-15 16:02:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 2.807098765432099) internal successors, (3638), 1296 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 3638 transitions. [2022-03-15 16:02:11,261 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 3638 transitions. Word has length 20 [2022-03-15 16:02:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:11,261 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 3638 transitions. [2022-03-15 16:02:11,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 3638 transitions. [2022-03-15 16:02:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:11,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:11,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:11,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (737)] Ended with exit code 0 [2022-03-15 16:02:11,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 737 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2022-03-15 16:02:11,479 INFO L402 AbstractCegarLoop]: === Iteration 743 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash -790145876, now seen corresponding path program 737 times [2022-03-15 16:02:11,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:11,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746989848] [2022-03-15 16:02:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:11,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:11,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:11,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746989848] [2022-03-15 16:02:11,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746989848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:11,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595304622] [2022-03-15 16:02:11,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:11,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:11,688 INFO L229 MonitoredProcess]: Starting monitored process 738 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:11,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (738)] Waiting until timeout for monitored process [2022-03-15 16:02:11,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:02:11,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:02:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:11,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:11,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:11,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:12,241 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:12,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 16:02:12,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 16:02:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:12,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595304622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:12,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:12,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:02:12,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294011453] [2022-03-15 16:02:12,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:12,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:02:12,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:02:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:12,348 INFO L87 Difference]: Start difference. First operand 1297 states and 3638 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:13,916 INFO L93 Difference]: Finished difference Result 1583 states and 4119 transitions. [2022-03-15 16:02:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:02:13,917 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:13,919 INFO L225 Difference]: With dead ends: 1583 [2022-03-15 16:02:13,919 INFO L226 Difference]: Without dead ends: 1536 [2022-03-15 16:02:13,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=2668, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:02:13,919 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 150 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:13,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 676 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:02:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-03-15 16:02:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1299. [2022-03-15 16:02:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8081664098613253) internal successors, (3645), 1298 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3645 transitions. [2022-03-15 16:02:13,935 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3645 transitions. Word has length 20 [2022-03-15 16:02:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:13,935 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 3645 transitions. [2022-03-15 16:02:13,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3645 transitions. [2022-03-15 16:02:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:13,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:13,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:13,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (738)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:14,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2022-03-15 16:02:14,149 INFO L402 AbstractCegarLoop]: === Iteration 744 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1358650660, now seen corresponding path program 738 times [2022-03-15 16:02:14,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:14,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548529509] [2022-03-15 16:02:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:14,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:14,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548529509] [2022-03-15 16:02:14,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548529509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:14,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719466631] [2022-03-15 16:02:14,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:14,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:14,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:14,283 INFO L229 MonitoredProcess]: Starting monitored process 739 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:14,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (739)] Waiting until timeout for monitored process [2022-03-15 16:02:14,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:02:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:02:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:14,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:14,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:14,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:14,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:14,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:14,863 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:14,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 94 [2022-03-15 16:02:14,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-03-15 16:02:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:14,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719466631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:14,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:14,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:02:14,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614108292] [2022-03-15 16:02:14,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:14,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:02:14,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:02:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:14,974 INFO L87 Difference]: Start difference. First operand 1299 states and 3645 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:15,950 INFO L93 Difference]: Finished difference Result 1495 states and 3981 transitions. [2022-03-15 16:02:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:02:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:15,952 INFO L225 Difference]: With dead ends: 1495 [2022-03-15 16:02:15,952 INFO L226 Difference]: Without dead ends: 1462 [2022-03-15 16:02:15,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:02:15,953 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:15,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 550 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1210 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-03-15 16:02:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-03-15 16:02:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1302. [2022-03-15 16:02:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.808608762490392) internal successors, (3654), 1301 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3654 transitions. [2022-03-15 16:02:15,968 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3654 transitions. Word has length 20 [2022-03-15 16:02:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:15,968 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 3654 transitions. [2022-03-15 16:02:15,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3654 transitions. [2022-03-15 16:02:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:15,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:15,970 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:15,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (739)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:16,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 739 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2022-03-15 16:02:16,185 INFO L402 AbstractCegarLoop]: === Iteration 745 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1971122312, now seen corresponding path program 739 times [2022-03-15 16:02:16,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:16,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672884038] [2022-03-15 16:02:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:16,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:16,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672884038] [2022-03-15 16:02:16,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672884038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:16,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756650148] [2022-03-15 16:02:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:16,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:16,329 INFO L229 MonitoredProcess]: Starting monitored process 740 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:16,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (740)] Waiting until timeout for monitored process [2022-03-15 16:02:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:02:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:16,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:16,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:02:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:16,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-03-15 16:02:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:16,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:17,035 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:17,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-03-15 16:02:17,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 78 [2022-03-15 16:02:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:17,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756650148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:17,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:17,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2022-03-15 16:02:17,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737918653] [2022-03-15 16:02:17,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:17,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:02:17,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:17,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:02:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:17,191 INFO L87 Difference]: Start difference. First operand 1302 states and 3654 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:17,928 INFO L93 Difference]: Finished difference Result 1444 states and 3893 transitions. [2022-03-15 16:02:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:02:17,928 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:02:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:17,930 INFO L225 Difference]: With dead ends: 1444 [2022-03-15 16:02:17,930 INFO L226 Difference]: Without dead ends: 1426 [2022-03-15 16:02:17,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:02:17,931 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:17,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 371 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 824 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-03-15 16:02:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2022-03-15 16:02:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1302. [2022-03-15 16:02:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.8078401229823213) internal successors, (3653), 1301 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3653 transitions. [2022-03-15 16:02:17,945 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3653 transitions. Word has length 20 [2022-03-15 16:02:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:17,946 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 3653 transitions. [2022-03-15 16:02:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3653 transitions. [2022-03-15 16:02:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:02:17,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:17,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:17,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (740)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:18,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2022-03-15 16:02:18,162 INFO L402 AbstractCegarLoop]: === Iteration 746 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash -748133460, now seen corresponding path program 740 times [2022-03-15 16:02:18,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:18,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873690411] [2022-03-15 16:02:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:18,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:18,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:18,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873690411] [2022-03-15 16:02:18,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873690411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:18,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654276627] [2022-03-15 16:02:18,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:18,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:18,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:18,425 INFO L229 MonitoredProcess]: Starting monitored process 741 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:18,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (741)] Waiting until timeout for monitored process [2022-03-15 16:02:18,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:02:18,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:18,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:18,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:02:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:18,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 5 [2022-03-15 16:02:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:18,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:19,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:19,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2022-03-15 16:02:19,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:19,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 93